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Subject: C&EN: IT'S ELEMENTAL: THE PERIODIC TABLE - INTRODUCTION
Date: Thu, 14 Jan 2010 08:41:11 -0500
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name=3DElement>=20
                    <OPTION value=3D# selected>Element Symbols<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/actinium.html>Ac<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/silver.html>Ag<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/aluminum.html>Al<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/americium.html>Am<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Ar<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/arsenic.html>As<OPTION=20
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value=3Dhttp://pubs.acs.org/cen/80th/astatine.html>At<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/gold.html>Au<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/boron.html>B<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/barium.html>Ba<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/beryllium.html>Be<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bohriumhassium.html>Bh<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bismuth.html>Bi<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/berkelium.html>Bk<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bromine.html>Br<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/carbon.html>C<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/calcium.html>Ca<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cadmium.html>Cd<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Ce<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/californium.html>Cf<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/chlorine.html>Cl<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/curium.html>Cm<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cobalt.html>Co<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cesium.html>Cs<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/chromium.html>Cr<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/copper.html>Cu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/dubnium.html>Db<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/darmstadtium.html>Ds<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Dy<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/einsteiniumfermium.html>Es<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Er<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Eu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/fluorine.html>F<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iron.html>Fe<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/einsteiniumfermium.html>Fm<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/francium.html>Fr<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/gallium.html>Ga<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Gd<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/germanium.html>Ge<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/hydrogen.html>H<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>He<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/hafnium.html>Hf<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/mercury.html>Hg<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Ho<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bohriumhassium.html>Hs<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iodine.html>I<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/indium.html>In<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iridium.html>Ir<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/potassium.html>K<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Kr<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>La<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lithium.html>Li<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lawrencium.html>Lr<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Lu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/mendelevium.html>Md<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/magnesium.html>Mg<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/manganese.html>Mn<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/molybdenum.html>Mo<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/meitnerium.html>Mt<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nitrogen.html>N<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/sodium.html>Na<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/niobium.html>Nb<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Nd<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Ne<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nickel.html>Ni<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nobelium.html>No<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/neptunium.html>Np<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/oxygen.html>O<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/osmium.html>Os<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/phosphorus.html>P<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/protactinium.html>Pa<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lead.html>Pb<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/palladium.html>Pd<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Pm<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/polonium.html>Po<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Pr<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/platinum.html>Pt<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/plutonium.html>Pu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/radium.html>Ra<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rubidium.html>Rb<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rhenium.html>Re<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rutherfordium.html>Rf<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rhodium.html>Rh<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Rn<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/ruthenium.html>Ru<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/sulfur.html>S<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/antimony.html>Sb<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/scandium.html>Sc<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/selenium.html>Se<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/seaborgium.html>Sg<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/silicon.html>Si<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Sm<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tin.html>Sn<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/strontium.html>Sr<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tantalum.html>Ta<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Tb<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/technetium.html>Tc<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tellurium.html>Te<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/thorium.html>Th<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/titanium.html>Ti<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/thallium.html>Tl<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Tm<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/uranium.html>U<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/darmstadtium.html>Uub<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/darmstadtium.html>Uuq<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/darmstadtium.html>Uuu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/vanadium.html>V<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tungsten.html>W<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Xe<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/yttrium.html>Y<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Yb<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/zinc.html>Zn<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/zirconium.html>Zr</OPTION></SELECT> =

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                <TD align=3Dmiddle width=3D160 height=3D23>
                  <CENTER>
                  <FORM name=3D2002 method=3Dpost><SELECT=20
                  onchange=3D"MM_jumpMenu('parent',this,0)" size=3D1 =
name=3DElement1>=20
                    <OPTION value=3D# selected>Element Names<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/actinium.html>Actinium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/aluminum.html>Aluminum<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/americium.html>Americium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/antimony.html>Antimony<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Argon<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/arsenic.html>Arsenic<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/astatine.html>Astatine<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/barium.html>Barium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/berkelium.html>Berkelium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/berylium.html>Beryllium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bismuth.html>Bismuth<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bohriumhassium.html>Bohrium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/boron.html>Boron<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bromine.html>Bromine<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cadmium.html>Cadmium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/calcium.html>Calcium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/californium.html>Californium<OPTION =

                    =
value=3Dhttp://pubs.acs.org/cen/80th/carbon.html>Carbon<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Cerium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cesium.html>Cesium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/chlorine.html>Chlorine<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/chromium.html>Chromium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cobalt.html>Cobalt<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/copper.html>Copper<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/curium.html>Curium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/darmstadtium.html>Darmstadtium+<OPTI=
ON=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/dubnium.html>Dubnium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Dysprosium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/einsteiniumfermium.html>Einsteinium<=
OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Erbium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Europium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/einsteiniumfermium.html>Fermium<OPTI=
ON=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/fluorine.html>Fluorine<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/francium.html>Francium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Gadolinium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/gallium.html>Gallium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/germanium.html>Germanium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/gold.html>Gold<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/hafnium.html>Hafnium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bohriumhassium.html>Hassium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Helium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Holmium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/hydrogen.html>Hydrogen<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/indium.html>Indium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iodine.html>Iodine<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iridium.html>Iridium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iron.html>Iron<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Krypton<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Lanthanum<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lawrencium.html>Lawrencium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lead.html>Lead<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lithium.html>Lithium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/magnesium.html>Magnesium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/manganese.html>Manganese<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/meitnerium.html>Meitnerium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/mendelevium.html>Mendelevium<OPTION =

                    =
value=3Dhttp://pubs.acs.org/cen/80th/mercury.html>Mercury<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/molybdenum.html>Molybdenum<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Neodymium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Neon<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/neptunium.html>Neptunium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nickel.html>Nickel<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/niobium.html>Niobium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nitrogen.html>Nitrogen<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nobelium.html>Nobelium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/osmium.html>Osmium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/oxygen.html>Oxygen<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/palladium.html>Palladium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/phosphorus.html>Phosphorus<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/platinum.html>Platinum<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/plutonium.html>Plutonium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/polonium.html>Polonium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/potassium.html>Potassium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Praseodymium<OPTION=
=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Promethium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/protractinium.html>Protactinium<OPTI=
ON=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/radium.html>Radium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Radon<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rhenium.html>Rhenium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rhodium.html>Rhodium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rubidium.html>Rubidium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/ruthenium.html>Ruthenium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rutherfordium.html>Rutherfordium<OPT=
ION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Samarium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/scandium.html>Scandium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/seaborgium.html>Seaborgium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/selenium.html>Selenium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/silicon.html>Silicon<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/silver.html>Silver<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/sodium.html>Sodium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/strontium.html>Strontium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/sulfur.html>Sulfur<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tantalum.html>Tantalum<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/technetium.html>Technetium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tellerium.html>Tellerium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Terbium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/thallium.html>Thallium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/thorium.html>Thorium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Thulium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tin.html>Tin<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/titanium.html>Titanium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tungsten.html>Tungsten<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/uranium.html>Uranium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/vanadium.html>Vanadium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Xenon<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Ytterbium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/yttrium.html>Yttrium<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/zinc.html>Zinc<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/zirconium.html>Zirconium</OPTION></S=
ELECT>=20
                  </FORM></CENTER></TD>
                <TD height=3D23>
                  <CENTER>
                  <FORM name=3D2001 method=3Dpost><SELECT=20
                  onchange=3D"MM_jumpMenu('parent',this,0)" size=3D1 =
name=3DElement2>=20
                    <OPTION value=3D# selected>Author Names<OPTION=20
                    value=3Dhttp://pubs.acs.org/cen/80th/arsenic.html>M. =
Feroze=20
                    Ahmed<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/radium.html>Donald P.=20
                    Ames<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bohriumhassium.html>Peter=20
                    Armbruster<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/technetium.html>John T.=20
                    Armstrong<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/plutonium.html>Shenda=20
                    Baker<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/noblegases.html>Neil=20
                    Bartlett<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/mercury.html>Rudy=20
                    Baum<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/zinc.html>Ronald=20
                    Breslow<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rhenium.html>Fred=20
                    Brot<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bismuth.html>Neil=20
                    Burford<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/chlorine.html>Cynthia=20
                    Burrows<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/vanadium.html>Alison=20
                    Butler<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/mendelevium.html>Gregory=20
                    R. Choppin<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/yttrium.html>Paul C.W.=20
                    Chu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/magnesium.html>Gerald D.=20
                    Cole<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/titanium.html>Thomas M.=20
                    Connelly Jr.<OPTION=20
                    value=3Dhttp://pubs.acs.org/cen/80th/boron.html>E.J. =

                    Corey<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/astatine.html>Dale R.=20
                    Corson<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/barium.html>Louisa=20
                    Dalton<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/fluorine.html>Nance=20
                    Dicciani<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tellurium.html>Donald C.=20
                    Dittmer<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/oxygen.html>Carl=20
                    Djerassi<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/uranium.html>Peter=20
                    Eichstaedt<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iridium.html>Richard=20
                    Eisenberg<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iron.html>Arthur B.=20
                    Ellis<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/calcium.html>Sture=20
                    Forsen<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rutherfordium.html>Michael=20
                    Freemantle<OPTION=20
                    value=3Dhttp://pubs.acs.org/cen/80th/tin.html>Sandy=20
                    Gerrard<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/einsteiniumfermium.html>Albert=20
                    Ghiorso<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/neptunium.html>Robin=20
                    Giroux<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/thorium.html>Seth=20
                    Grae<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/chromium.html>Harry B.=20
                    Gray<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/bromine.html>Ari=20
                    Greenspan<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/platinum.html>Richard M.=20
                    Gross<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/ruthenium.html>Robert H.=20
                    Grubbs<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/germanium.html>Beth=20
                    Halford<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rhodium.html>Jack=20
                    Halpern<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nickel.html>David=20
                    Hanson<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/indium.html>Celia=20
                    Henry<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/darmstadium.html>Darleane=20
                    Hoffman<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/silicon.html>Roald=20
                    Hoffman<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/polonium.html>Cheryl=20
                    Hogue<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/zirconium.html>Nancy=20
                    Jackson<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cerium.html>Richard=20
                    Kaner<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/californium.html>Jyllian=20
                    Kemsley<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/hydrogen.html>Judith=20
                    Klinman<OPTION=20
                    value=3Dhttp://pubs.acs.org/cen/80th/gold.html>Alan=20
                    Lightman<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tungsten.html>Rick=20
                    Lowden<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/strontium.html>Arjun=20
                    Makhijani<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/molybdenum.html>Philip=20
                    C.H. Mitchell<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/potassium.html>Susan=20
                    Morrissey<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nitrogen.html>Peter=20
                    Nagler<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/beryllium.html>Lee S.=20
                    Newman<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/thallium.html>Jerome=20
                    Nriagu<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/nobelium.html>Matti=20
                    Nurmia<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/carbon.html>George A.=20
                    Olah<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/francium.html>Luis A.=20
                    Orozco<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/palladium.html>Larry=20
                    Overman<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/americium.html>Rachel=20
                    Pepling<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Joop A.=20
                    Peters<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/phosphorus.html>Dale=20
                    Poulter<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/scandium.html>Gunnar=20
                    Raade<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lanthanides.html>Douglas=20
                    J. Raber<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/protractinium.html>Linda=20
                    Raber<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/meitnerium.html>Patricia=20
                    Rife<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/rubidium.html>Steve=20
                    Ritter<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/aluminum.html>Gregory H.=20
                    Robinson<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/gallium.html>Oliver=20
                    Sacks<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/hafnium.html>Eric=20
                    Scerri<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lithium.html>Paul v.R.=20
                    Schleyer<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/tantalum.html>Richard R.=20
                    Schrock<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/sodium.html>Kurt=20
                    Schroder<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/curium.html>William=20
                    Schulz<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cobalt.html>Ekkehard=20
                    Schwab<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/seaborgium.html>Eric=20
                    Seaborg<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lead.html>Bassam=20
                    Shakhashiri<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/silver.html>Alan=20
                    Shaw<OPTION=20
                    value=3Dhttp://pubs.acs.org/cen/80th/osmium.html>Ian =

                    Shott<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/sulfur.html>Amos=20
                    Smith<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/iodine.html>Peter J.=20
                    Stang<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/lawrencium.html>Stephen=20
                    Trzaska<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/selenium.html>Liu=20
                    Tungshen<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/antimony.html>Nina=20
                    Ulrich<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/actinium.html>Greg=20
                    Wall<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/copper.html>George M.=20
                    Whitesides<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/cadmium.html>Robert L.=20
                    Wolke<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/berkelium.html>Amanda=20
                    Yarnell<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/selenium.html>Hong=20
                    Yetang<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/niobium.html>Pam=20
                    Zurer<OPTION=20
                    =
value=3Dhttp://pubs.acs.org/cen/80th/dubnium.html>Ivo=20
                    Zvara</OPTION></SELECT>=20
        </FORM></CENTER></TD></TR></TBODY></TABLE></TD></TR>
        <TR vAlign=3Dtop>
          <TD bgColor=3Dwhite colSpan=3D3><IMG height=3D1=20
            src=3D"http://pubs.acs.org/images/v3/2x2clear.gif" =
width=3D760=20
          border=3D0></TD></TR></TBODY></TABLE><!--- C&EN Navigation =
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        <TBODY>
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          <TD width=3D760 =
bgColor=3D#cccccc></TD></TR></TBODY></TABLE><!--- C&EN Navigation End =
---><!--- Periodic Table Text Start Here ---></TD>
    <TD class=3DgridLine vAlign=3Dtop width=3D1 bgColor=3Dblack =
height=3D28><IMG=20
      height=3D1 src=3D"http://pubs.acs.org/images/v3/2x2clear.gif" =
width=3D1></TD></TR>
  <TR>
    <TD class=3DgridLine vAlign=3Dtop bgColor=3Dblack colSpan=3D5><IMG =
height=3D1=20
      src=3D"http://pubs.acs.org/images/v3/2x2clear.gif" =
width=3D1></TD></TR>
  <TR>
    <TD class=3DgridLine vAlign=3Dtop width=3D1 =
bgColor=3Dblack><BR></TD>
    <TD vAlign=3Dtop bgColor=3Dwhite>&nbsp;</TD>
    <TD vAlign=3Dtop width=3D690 bgColor=3Dwhite><FONT=20
      face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular size=3D2><BR>
      <P><FONT face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular><IMG =
class=3Dleft=20
      height=3D50 alt=3D"" hspace=3D3=20
      src=3D"http://pubs.acs.org/cen/_toc/101909/ncw-90.jpg" width=3D50 =
align=3Dleft=20
      vspace=3D3>=20
      <H3><A href=3D"http://www.acs.org/ncw">National Chemistry Week, =
October=20
      19-24, 2009</A></H3>
      <P>NCW kicks off this week with the theme "Chemistry=97It's =
Elemental!"=20
      Visit <A href=3D"http://www.acs.org/ncw">www.acs.org/ncw</A> for =
more=20
      information.</P></FONT>
      <CENTER>
      <P><FONT size=3D3>
      <TABLE cellSpacing=3D0 cellPadding=3D1 width=3D612 =
bgColor=3D#eeeeee border=3D0>
        <TBODY>
        <TR>
          <TD bgColor=3Dblack>
            <TABLE height=3D361 cellSpacing=3D1 cellPadding=3D1 =
width=3D609 border=3D0>
              <TBODY>
              <TR height=3D23>
                <TD vAlign=3Dcenter align=3Dleft bgColor=3Dwhite =
colSpan=3D18=20
                  height=3D23><CENTER><FONT=20
                  =
face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular><B><TI>THE=20
                  PERIODIC TABLE OF THE =
ELEMENTS</TI></B></FONT></CENTER></TD></TR>
              <TR height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>1<BR></FONT><A =
onmouseover=3DdoTooltip(event,1)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/hydrogen.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>H</B></FONT></A></TD>
                <TD align=3Dleft bgColor=3Dwhite colSpan=3D16 =
height=3D24>
                  <CENTER><FONT=20
                  =
face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular><B><BR></B></FONT></C=
ENTER></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eeeeee =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>2<BR></FONT><A =
onmouseover=3DdoTooltip(event,2)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/noblegases.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>He</B></FONT></A></TD></TR>
              <TR height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>3<BR></FONT><A =
onmouseover=3DdoTooltip(event,3)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lithium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Li</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>4<BR></FONT><A =
onmouseover=3DdoTooltip(event,4)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/beryllium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Be</B></FONT></A></TD>
                <TD align=3Dleft bgColor=3Dwhite colSpan=3D10 =
height=3D24><BR></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>5<BR></FONT><A =
onmouseover=3DdoTooltip(event,5)=20
                  onmouseout=3DhideTip()=20
                  href=3D"http://pubs.acs.org/cen/80th/boron.html"><FONT =

                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>B</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>6<BR></FONT><A =
onmouseover=3DdoTooltip(event,6)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/carbon.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>C</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>7<BR></FONT><A =
onmouseover=3DdoTooltip(event,7)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/nitrogen.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>N</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>8<BR></FONT><A =
onmouseover=3DdoTooltip(event,0)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/oxygen.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>O</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>9<BR></FONT><A =
onmouseover=3DdoTooltip(event,9)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/fluorine.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>F</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eeeeee =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>10<BR></FONT><A =
onmouseover=3DdoTooltip(event,10)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/noblegases.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ne</B></FONT></A></TD></TR>
              <TR height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>11</FONT><BR><A =
onmouseover=3DdoTooltip(event,11)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/sodium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Na</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>12</FONT><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1><BR></FONT><A =
onmouseover=3DdoTooltip(event,12)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/magnesium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Mg</B></FONT></A></TD>
                <TD align=3Dleft bgColor=3Dwhite colSpan=3D10 =
height=3D24><BR></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>13<BR></FONT><A =
onmouseover=3DdoTooltip(event,13)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/aluminum.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Al</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>14<BR></FONT><A =
onmouseover=3DdoTooltip(event,14)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/silicon.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Si</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>15<BR></FONT><A =
onmouseover=3DdoTooltip(event,15)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/phosphorus.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>P</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>16<BR></FONT><A =
onmouseover=3DdoTooltip(event,16)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/sulfur.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>S</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>17<BR></FONT><A =
onmouseover=3DdoTooltip(event,17)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/chlorine.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cl</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eeeeee =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>18<BR></FONT><A =
onmouseover=3DdoTooltip(event,18)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/noblegases.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ar</B></FONT></A></TD></TR>
              <TR height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>19</FONT><BR><A =
onmouseover=3DdoTooltip(event,19)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/potassium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>K</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>20<BR></FONT><A =
onmouseover=3DdoTooltip(event,20)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/calcium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ca</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>21<BR></FONT><A =
onmouseover=3DdoTooltip(event,21)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/scandium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Sc</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>22<BR></FONT><A =
onmouseover=3DdoTooltip(event,22)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/titanium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ti</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>23<BR></FONT><A =
onmouseover=3DdoTooltip(event,23)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/vanadium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>V</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>24<BR></FONT><A =
onmouseover=3DdoTooltip(event,24)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/chromium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cr</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D28 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>25<BR></FONT><A =
onmouseover=3DdoTooltip(event,25)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/manganese.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Mn</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>26<BR></FONT><A =
onmouseover=3DdoTooltip(event,26)=20
                  onmouseout=3DhideTip()=20
                  href=3D"http://pubs.acs.org/cen/80th/iron.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Fe</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>27<BR></FONT><A =
onmouseover=3DdoTooltip(event,27)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/cobalt.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Co</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>28<BR></FONT><A =
onmouseover=3DdoTooltip(event,28)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/nickel.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ni</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>29<BR></FONT><A =
onmouseover=3DdoTooltip(event,29)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/copper.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cu</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>30<BR></FONT><A =
onmouseover=3DdoTooltip(event,30)=20
                  onmouseout=3DhideTip()=20
                  href=3D"http://pubs.acs.org/cen/80th/zinc.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Zn</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>31<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/gallium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ga</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>32<BR></FONT><A =
onmouseover=3DdoTooltip(event,32)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/germanium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ge</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>33<BR></FONT><A =
onmouseover=3DdoTooltip(event,33)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/arsenic.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>As</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>34<BR></FONT><A =
onmouseover=3DdoTooltip(event,34)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/selenium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Se</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>35<BR></FONT><A =
onmouseover=3DdoTooltip(event,35)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/bromine.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Br</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eeeeee =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>36<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/noblegases.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Kr</B></FONT></A></TD></TR>
              <TR height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>37<BR></FONT><A =
onmouseover=3DdoTooltip(event,37)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/rubidium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Rb</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>38<BR></FONT><A =
onmouseover=3DdoTooltip(event,38)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/strontium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Sr</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>39<BR></FONT><A =
onmouseover=3DdoTooltip(event,39)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/yttrium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Y</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>40<BR></FONT><A =
onmouseover=3DdoTooltip(event,40)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/zirconium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Zr</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>41<BR></FONT><A =
onmouseover=3DdoTooltip(event,41)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/niobium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Nb</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>42<BR></FONT><A =
onmouseover=3DdoTooltip(event,42)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/molybdenum.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Mo</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D28 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>43<BR></FONT><A =
onmouseover=3DdoTooltip(event,43)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/technetium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Tc</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>44<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/ruthenium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ru</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>45<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/rhodium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Rh</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>46<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/palladium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pd</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>47<BR></FONT><A =
onmouseover=3DdoTooltip(event,47)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/silver.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ag</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>48<BR></FONT><A =
onmouseover=3DdoTooltip(event,48)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/cadmium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cd</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>49<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/indium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>In</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>50<BR></FONT><A =
onmouseover=3DdoTooltip(event,50)=20
                  onmouseout=3DhideTip()=20
                  href=3D"http://pubs.acs.org/cen/80th/tin.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Sn</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>51<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/antimony.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Sb</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>52<BR></FONT><A =
onmouseover=3DdoTooltip(event,52)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/tellurium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Te</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>53<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/iodine.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>I</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eeeeee =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>54<BR></FONT><A =
onmouseover=3DdoTooltip(event,54)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/noblegases.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Xe</B></FONT></A></TD></TR>
              <TR height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>55<BR></FONT><A =
onmouseover=3DdoTooltip(event,55)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/cesium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cs</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>56<BR></FONT><A =
onmouseover=3DdoTooltip(event,56)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/barium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ba</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>57*<BR></FONT><A =
onmouseover=3DdoTooltip(event,57)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>La</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>72<BR></FONT><A =
onmouseover=3DdoTooltip(event,72)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/hafnium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Hf</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>73<BR></FONT><A =
onmouseover=3DdoTooltip(event,73)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/tantalum.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ta</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>74<BR></FONT><A =
onmouseover=3DdoTooltip(event,74)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/tungsten.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>W</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D28 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>75<BR></FONT><A =
onmouseover=3DdoTooltip(event,75)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/rhenium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Re</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>76<BR></FONT><A =
onmouseover=3DdoTooltip(event,76)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/osmium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Os</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>77<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/iridium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ir</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>78<BR></FONT><A =
onmouseover=3DdoTooltip(event,78)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/platinum.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pt</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>79<BR></FONT><A =
onmouseover=3DdoTooltip(event,79)=20
                  onmouseout=3DhideTip()=20
                  href=3D"http://pubs.acs.org/cen/80th/gold.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Au</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>80<BR></FONT><A =
onmouseover=3DdoTooltip(event,80)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/mercury.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Hg</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>81<BR></FONT><A =
onmouseover=3DdoTooltip(event,81)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/thallium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Tl</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>82<BR></FONT><A =
onmouseover=3DdoTooltip(event,82)=20
                  onmouseout=3DhideTip()=20
                  href=3D"http://pubs.acs.org/cen/80th/lead.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pb</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>83<BR></FONT><A =
onmouseover=3DdoTooltip(event,83)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/bismuth.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Bi</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>84<BR></FONT><A =
onmouseover=3DdoTooltip(event,84)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/polonium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Po</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>85<BR></FONT><A =
onmouseover=3DdoTooltip(event,85)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/astatine.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>At</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eeeeee =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>86<BR></FONT><A =
onmouseover=3DdoTooltip(event,86)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/noblegases.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Rn</B></FONT></A></TD></TR>
              <TR bgColor=3Dwhite height=3D24>
                <TD align=3Dmiddle width=3D30 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>87</FONT><BR><A =
onmouseover=3DdoTooltip(event,87)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/francium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Fr</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffff33 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>88</FONT><BR><A =
onmouseover=3DdoTooltip(event,88)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/radium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ra</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>89**<BR></FONT><A =
onmouseover=3DdoTooltip(event,89)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/actinium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ac</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>104<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/rutherfordium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Rf</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>105<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/dubnium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Db</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>106<BR></FONT><A =
onmouseover=3DdoTooltip(event,92)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/seaborgium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Sg</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D28 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>107<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/bohriumhassium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Bh</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>108<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/bohriumhassium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Hs</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>109<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/meitnerium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Mt</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>110<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/darmstadtium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ds</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>111<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/darmstadtium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Uuu</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#eee8aa =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>112<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/darmstadtium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Uub</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3Dwhite =
height=3D24><BR></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ccffff =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>114<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/darmstadtium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Uuq</B></FONT></A></TD>
                <TD colSpan=3D4 height=3D24><BR></TD></TR>
              <TR bgColor=3Dwhite height=3D10>
                <TD colSpan=3D18 height=3D10><BR></TD></TR>
              <TR bgColor=3Dwhite height=3D24>
                <TD vAlign=3Dcenter bgColor=3D#ffcc00 colSpan=3D3 =
height=3D24>
                  <CENTER><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular =
size=3D2><B>*=20
                  Lanthanide series</B></FONT></CENTER></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>58</FONT><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1><BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ce</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>59<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pr</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>60<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Nd</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D28 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>61<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pm</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>62<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Sm</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>63<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Eu</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>64<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Gd</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>65<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Tb</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>66<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Dy</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>67<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Ho</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>68<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Er</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>69<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Tm</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>70<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Yb</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>71<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lanthanides.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Lu</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 =
height=3D24>&nbsp;<BR></TD></TR>
              <TR bgColor=3Dwhite height=3D24>
                <TD vAlign=3Dcenter bgColor=3D#ffcc00 colSpan=3D3 =
height=3D24>
                  <CENTER><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular =
size=3D2><B>**=20
                  Actinide series</B></FONT></CENTER></TD><BR>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>90<BR></FONT><A =
onmouseover=3DdoTooltip(event,90)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/thorium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Th</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>91<BR></FONT><A =
onmouseover=3DdoTooltip(event,91)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/protactinium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pa</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>92<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/uranium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>U</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D28 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>93<BR></FONT><A =
onmouseover=3DdoTooltip(event,93)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/neptunium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Np</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>94<BR></FONT><A =
onmouseover=3DdoTooltip(event,94)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/plutonium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Pu</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>95<BR></FONT><A =
onmouseover=3DdoTooltip(event,95)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/americium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Am</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>96<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/curium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cm</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>97<BR></FONT><A =
onmouseover=3DdoTooltip(event,97)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/berkelium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Bk</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>98<BR></FONT><A =
onmouseover=3DdoTooltip(event,98)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/californium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Cf</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>99<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/einsteiniumfermium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Es</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>100<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/einsteiniumfermium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Fm</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>101<BR></FONT><A =
onmouseover=3DdoTooltip(event,60)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/mendelevium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Md</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>102<BR></FONT><A=20
                  =
href=3D"http://pubs.acs.org/cen/80th/nobelium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>No</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 bgColor=3D#ffcc00 =
height=3D24><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>103<BR></FONT><A =
onmouseover=3DdoTooltip(event,59)=20
                  onmouseout=3DhideTip()=20
                  =
href=3D"http://pubs.acs.org/cen/80th/lawrencium.html"><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>Lr</B></FONT></A></TD>
                <TD align=3Dmiddle width=3D31 =
height=3D24>&nbsp;<BR></TD></TR>
              <TR bgColor=3Dwhite>
                <TD vAlign=3Dtop align=3Dright colSpan=3D18>
                  <CENTER><BR><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D2><B>NOTE: </B>Yellow indicates alkali and =
alkaline earth=20
                  metals; tan, transition metals; blue, main-group =
elements;=20
                  gray, noble gases; and orange, lanthanide and actinide =

                  =
series</FONT></CENTER></TD></TR></TBODY></TABLE></TD></TR>
        <TR>
          <TD></TD></TR></TBODY></TABLE></FONT></P></CENTER>
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                <TD bgColor=3Dwhite>
                  <CENTER><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  color=3D#cc000c size=3D2><B>EDITOR'S=20
NOTE</B></FONT></CENTER></TD></TR>
              <TR>
                <TD>
                  <CENTER><FONT=20
                  face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular =
size=3D1><IMG=20
                  height=3D156=20
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src=3D"http://pubs.acs.org/cen/images/8136/cencover8136.jpg"=20
                  width=3D115></FONT></CENTER></TD></TR>
              <TR>
                <TD><FONT =
face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular=20
                  size=3D1>C&amp;EN has received numerous letters =
praising this=20
                  special issue, The Periodic Table (Sept. 8), and =
inquiring how=20
                  to obtain multiple copies for classroom use. The =
entire issue=20
                  is on the Web free of charge at <A=20
                  =
href=3D"http://www.cen-online.org/80th/elements.html">http://www.cen-onli=
ne.org/80th/elements.html</A>.=20
                  Click on the C&amp;EN 80th anniversary icon. Bulk =
copies of=20
                  the special issue are also available. Single issues =
cost $22=20
                  each. 10 or more cost $11 each. Direct inquiries to =
Margaret=20
                  Neville, <A=20
                  =
href=3D"mailto:m_neville@acs.org">m_neville@acs.org</A>, or=20
                  Sandra Tinker, <A=20
                  href=3D"mailto:s_tinker@acs.org">s_tinker@acs.org</A>. =
An=20
                  individual free copy is available to teachers by =
sending an=20
                  e-mail to <A title=3D"Publications Support Services"=20
                  =
href=3D"mailto:pss@acs.org">pss@acs.org</A>.</FONT></TD></TR></TBODY></TA=
BLE></TD></TR></TBODY></TABLE><FONT=20
      face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular =
size=3D1><AU>RUDY=20
      BAUM</AU>, C&amp;EN WASHINGTON</FONT></P>
      <P><FONT=20
      =
face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular><B>T</B></FONT><FONT =

      face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular size=3D2>he =
Periodic Table=20
      is nature=92s rosetta stone. To the uninitiated, it=92s just =
100-plus numbered=20
      boxes, each containing one or two letters, arranged with an odd, =
skewed=20
      symmetry. To chemists, however, the periodic table reveals the =
organizing=20
      principles of matter, which is to say, the organizing principles =
of=20
      chemistry. At a fundamental level, all of chemistry is contained =
in the=20
      periodic table.</FONT></P>
      <P><FONT face=3DArial,Helvetica,Geneva,Swiss,SunSans-Regular =
size=3D2>That=92s=20
      not to say, of course, that all of chemistry is obvious from the =
periodic=20
      table. Far from it. But the structure of the table reflects the =
electronic=20
      structure of the elements, and hence their chemical properties and =

      behavior. Perhaps it would be more appropriate to say that all of=20
      chemistry starts with the periodic table. What has always struck =
me as=20
      remarkable about Dmitry Mendeleyev=92s discovery in 1869 of a way =
to arrange=20
      the elements known at that time into a meaningful and predictive =
periodic=20
      table is that he accomplished it without any knowledge of the =
structure of=20
      atoms. There are no atomic numbers on Mendeleyev=92s periodic =
table, only=20
      atomic weights and the groupings of elements based on their known=20
      properties. More than 30 years would pass before J. J. Thomson =
(who=20
      discovered the electron) suggested that the electronic =
configuration of=20
      atoms might account for the periodicity of the elements, and more =
than 40=20
      years would pass before atomic numbers were recognized as the =
basis for=20
      ordering the elements.<BR><BR>Indeed, as John Emsley notes in his=20
      invaluable book, =93Nature=92s Building Blocks: An A=96Z Guide to =
the Elements,=94=20
      Mendeleyev never accepted that electrons came from atoms because =
he was=20
      convinced that atoms were indivisible.<BR><BR>No matter. =
Mendeleyev=92s=20
      brilliant insight propelled chemistry into the 20th century. New =
elements=20
      were discovered that filled in the holes Mendeleyev left in his =
table, and=20
      their atomic weights and chemical properties corresponded with =
remarkable=20
      accuracy to Mendeleyev=92s predictions. And as the revolution in =
chemistry=20
      and physics unfolded in the early decades of the 20th century, =
most of the=20
      discoveries about the structure of atoms, their properties, and =
how they=20
      interact with each other made perfect sense in light of the =
periodic=20
      table.<BR><BR>The periodic table is so central to chemistry that =
it seemed=20
      natural to devote a special issue to it and the elements that =
compose it=20
      as we celebrate C&amp;EN=92s 80th anniversary. The 89 essays are=20
      delightfully varied. We hope they will give you a new perspective =
on and=20
      appreciation of the building blocks of our science.<BR></FONT></P>
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------=_NextPart_000_0005_01CA94F5.534A0A20--
