C&EN | Periodic Table Element Symbols Ac Ag Al Am Ar As At Au B Ba Be Bh Bi Bk Br C Ca Cd Ce Cf Cl Cm Co Cs Cr Cu Db Ds Dy Es Er Eu F Fe Fm Fr Ga Gd Ge H He Hf Hg Ho Hs I In Ir K Kr La Li Lr Lu Md Mg Mn Mo Mt N Na Nb Nd Ne Ni No Np O Os P Pa Pb Pd Pm Po Pr Pt Pu Ra Rb Re Rf Rh Rn Ru S Sb Sc Se Sg Si Sm Sn Sr Ta Tb Tc Te Th Ti Tl Tm U Uub Uuq Uuu V W Xe Y Yb Zn Zr Element Names Actinium Aluminum Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Bohrium Boron Bromine Cadmium Calcium Californium Carbon Cerium Cesium Chlorine Chromium Cobalt Copper Curium Darmstadtium+ Dubnium Dysprosium Einsteinium Erbium Europium Fermium Fluorine Francium Gadolinium Gallium Germanium Gold Hafnium Hassium Helium Holmium Hydrogen Indium Iodine Iridium Iron Krypton Lanthanum Lawrencium Lead Lithium Magnesium Manganese Meitnerium Mendelevium Mercury Molybdenum Neodymium Neon Neptunium Nickel Niobium Nitrogen Nobelium Osmium Oxygen Palladium Phosphorus Platinum Plutonium Polonium Potassium Praseodymium Promethium Protactinium Radium Radon Rhenium Rhodium Rubidium Ruthenium Rutherfordium Samarium Scandium Seaborgium Selenium Silicon Silver Sodium Strontium Sulfur Tantalum Technetium Tellerium Terbium Thallium Thorium Thulium Tin Titanium Tungsten Uranium Vanadium Xenon Ytterbium Yttrium Zinc Zirconium Author Names M. Feroze Ahmed Donald P. Ames Peter Armbruster John T. Armstrong Shenda Baker Neil Bartlett Rudy Baum Ronald Breslow Fred Brot Neil Burford Cynthia Burrows Alison Butler Gregory R. Choppin Paul C.W. Chu Gerald D. Cole Thomas M. Connelly Jr. E.J. Corey Dale R. Corson Louisa Dalton Nance Dicciani Donald C. Dittmer Carl Djerassi Peter Eichstaedt Richard Eisenberg Arthur B. Ellis Sture Forsen Michael Freemantle Sandy Gerrard Albert Ghiorso Robin Giroux Seth Grae Harry B. Gray Ari Greenspan Richard M. Gross Robert H. Grubbs Beth Halford Jack Halpern David Hanson Celia Henry Darleane Hoffman Roald Hoffman Cheryl Hogue Nancy Jackson Richard Kaner Jyllian Kemsley Judith Klinman Alan Lightman Rick Lowden Arjun Makhijani Philip C.H. Mitchell Susan Morrissey Peter Nagler Lee S. Newman Jerome Nriagu Matti Nurmia George A. Olah Luis A. Orozco Larry Overman Rachel Pepling Joop A. Peters Dale Poulter Gunnar Raade Douglas J. Raber Linda Raber Patricia Rife Steve Ritter Gregory H. Robinson Oliver Sacks Eric Scerri Paul v.R. Schleyer Richard R. Schrock Kurt Schroder William Schulz Ekkehard Schwab Eric Seaborg Bassam Shakhashiri Alan Shaw Ian Shott Amos Smith Peter J. Stang Stephen Trzaska Liu Tungshen Nina Ulrich Greg Wall George M. Whitesides Robert L. Wolke Amanda Yarnell Hong Yetang Pam Zurer Ivo Zvara
		National Chemistry Week, October 19-24, 2009 NCW kicks off this week with the theme "Chemistry—It's Elemental!" Visit www.acs.org/ncw for more information. THE PERIODIC TABLE OF THE ELEMENTS 1 H 2 He 3 Li 4 Be 5 B 6 C 7 N 8 O 9 F 10 Ne 11 Na 12 Mg 13 Al 14 Si 15 P 16 S 17 Cl 18 Ar 19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr 37 Rb 38 Sr 39 Y 40 Zr 41 Nb 42 Mo 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag 48 Cd 49 In 50 Sn 51 Sb 52 Te 53 I 54 Xe 55 Cs 56 Ba 57* La 72 Hf 73 Ta 74 W 75 Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 81 Tl 82 Pb 83 Bi 84 Po 85 At 86 Rn 87 Fr 88 Ra 89** Ac 104 Rf 105 Db 106 Sg 107 Bh 108 Hs 109 Mt 110 Ds 111 Uuu 112 Uub 114 Uuq * Lanthanide series 58 Ce 59 Pr 60 Nd 61 Pm 62 Sm 63 Eu 64 Gd 65 Tb 66 Dy 67 Ho 68 Er 69 Tm 70 Yb 71 Lu   ** Actinide series 90 Th 91 Pa 92 U 93 Np 94 Pu 95 Am 96 Cm 97 Bk 98 Cf 99 Es 100 Fm 101 Md 102 No 103 Lr   NOTE: Yellow indicates alkali and alkaline earth metals; tan, transition metals; blue, main-group elements; gray, noble gases; and orange, lanthanide and actinide series EDITOR'S NOTE C&EN has received numerous letters praising this special issue, The Periodic Table (Sept. 8), and inquiring how to obtain multiple copies for classroom use. The entire issue is on the Web free of charge at http://www.cen-online.org. Click on the C&EN 80th anniversary icon. Bulk copies of the special issue are also available. Single issues cost $22 each. 10 or more cost $11 each. Direct inquiries to Margaret Neville, m_neville@acs.org, or Sandra Tinker, s_tinker@acs.org. An individual free copy is available to teachers by sending an e-mail to pss@acs.org. RUDY BAUM, C&EN WASHINGTON The Periodic Table is nature’s rosetta stone. To the uninitiated, it’s just 100-plus numbered boxes, each containing one or two letters, arranged with an odd, skewed symmetry. To chemists, however, the periodic table reveals the organizing principles of matter, which is to say, the organizing principles of chemistry. At a fundamental level, all of chemistry is contained in the periodic table. That’s not to say, of course, that all of chemistry is obvious from the periodic table. Far from it. But the structure of the table reflects the electronic structure of the elements, and hence their chemical properties and behavior. Perhaps it would be more appropriate to say that all of chemistry starts with the periodic table. What has always struck me as remarkable about Dmitry Mendeleyev’s discovery in 1869 of a way to arrange the elements known at that time into a meaningful and predictive periodic table is that he accomplished it without any knowledge of the structure of atoms. There are no atomic numbers on Mendeleyev’s periodic table, only atomic weights and the groupings of elements based on their known properties. More than 30 years would pass before J. J. Thomson (who discovered the electron) suggested that the electronic configuration of atoms might account for the periodicity of the elements, and more than 40 years would pass before atomic numbers were recognized as the basis for ordering the elements. Indeed, as John Emsley notes in his invaluable book, “Nature’s Building Blocks: An A–Z Guide to the Elements,” Mendeleyev never accepted that electrons came from atoms because he was convinced that atoms were indivisible. No matter. Mendeleyev’s brilliant insight propelled chemistry into the 20th century. New elements were discovered that filled in the holes Mendeleyev left in his table, and their atomic weights and chemical properties corresponded with remarkable accuracy to Mendeleyev’s predictions. And as the revolution in chemistry and physics unfolded in the early decades of the 20th century, most of the discoveries about the structure of atoms, their properties, and how they interact with each other made perfect sense in light of the periodic table. The periodic table is so central to chemistry that it seemed natural to devote a special issue to it and the elements that compose it as we celebrate C&EN’s 80th anniversary. The 89 essays are delightfully varied. We hope they will give you a new perspective on and appreciation of the building blocks of our science. E-mail this article to a friend E-mail the editor Top Chemical & Engineering News Copyright © 2003 American Chemical Society
	C&EN | Periodic Table | How To Reach Us | How to Advertise | Editorial Calendar | Email Webmaster

Chemical & Engineering News Copyright © 2003 American Chemical Society. All rights reserved. • (202) 872-4600 • (800) 227-5558