Fundamentals of Chemistry DOE-HDBK-1015/1-93 CHARACTERISTICS OF ATOMS Rev. 0 CH-01 Page 5 TABLE 2 Table of Elements Name and Symbol Number Weight Name Number Weight Atomic Atomic Atomic Atomic (amu) (amu) Actinium Ac 89 (227) Curium Cm 96 (247) Aluminum Al   13 26.981 Dysprosium Dy   66 162.50 Americium Am 95 (243) Einsteinium Es   99 (252) Antimony Sb   51 121.75 Erbium Er   68 167.26 Argon Ar   18 39.948 Europium Eu   63 151.96 Arsenic As   33 74.921 Fermium Fm 100 (257) Astatine At   85 (210) Fluorine F    9 18.998 Barium Ba   56 137.34 Francium Fr   87 (223) Berkelium Bk   97 (247) Gadolinium Gd   64 157.25 Beryllium Be   4 9.012 Gallium Ga   31 69.72 Bismuth Bi   83 208.980 Germanium Ge   32 72.59 Boron B    5 10.811 Gold Au   79 196.967 Bromine Br   35 79.909 Hafnium Hf   72 178.49 Cadmium Cd   48 112.40 Helium He   2   4.0026 Calcium Ca   20 40.08 Holmium Ho   67 164.930 Californium Cf   98 (251) Hydrogen H    1 1.0079 Carbon C    6 12.011 Indium In   49 114.82 Cerium Ce 58 140.12 Iodine I    53 126.904 Cesium Cs   55 132.905 Iridium Ir   77 192.2 Chlorine Cl   17 35.453 Iron Fe 26 55.874 Chromium Cr   24 51.996 Krypton Kr 36 83.80 Cobalt Co   27 58.933 Lanthanum La 57 138.91 Copper Cu   29 63.546 Lawrencium Lw 103 (260)