APPENDIX I THE ELEMENTS, THEIR ATOMIC NUMBERS, ATOMIC WEIGHTS, AND CHEMICAL POSITIONS
Reading edition
1 H 1.008
0 I II III IV V VI VII VIII
2 He 3.99 3 Li 6.94 4 Be 9.1 5 B 11.0 6 C 12.00 7 N 14.01 8 O 16.00 9 F 19.0
10 Ne 20.2 11 Na 23.00 12 Mg 24.32 13 Al 27.1 14 Si 28.3 5 P 31.04 16 S 32.06 17 Cl 35.46
18 A 39.88 19 K 39.10 20 Ca 40.07 21 Sc 44.1 22 Ti 48.1 23 V 51.0 24 Cr 52.0 25 Mn 54.93 26 Fe 27 Co 28 Ni 55.84 58.97 58.68
29 Cu 63.57 30 Zn 65.37 31 Ga 69.9 32 Ge 72.5 33 As 74.96 34 Se 79.2 35 Br 79.92
36 Kr 82.92 37 Rb 85.45 38 Sr 87.63 39 Y 88.7 40 Zr 90.6 41 Nb 93.5 42 Mo 96.0 43— 44 Ru 45 Rh 46 Pd 101.7 102.9 106.7
47 Ag 107.88 48 Cd 112.40 49 In 114.8 50 Sn 118.7 51 Sb 120.2 52 Te 127.5 53 J 126.92
54 X 130.2 55 Cs 132.81 56 Ba 137.37 57 La 58 Ce 59 Pr 60 Nd 61—62 Sm 63 Eu 64 Gd 65 Tb 66 Ds 139.0 140.25 140.6 144.3 150.4 152 157.0 159.2 162.5
67 Ho 68 Ev 69 Tu 70 Yb 71 Lu 72Hf 163.5 167.7 168.5 173.5 175.0 73 Ta 181.5 74 W 184.0 75— 76 Os 77 Ir 78 Pt 190.9 193.1 195.2
79 Au 197.2 80 Hg 200.6 81 Tl 204.0 82 Pb 207.20 83 Bi 208.0 84 Po (210.0) 85—
86 Ni (222.0) 87— 88 Ra 226.0 89 Ac (227) 90 Th 232.15 91 Pa (234) 92 U 238.2
Elements, the atomic numbers of which are not in the order of atomic weights, are in italics. The numbers corresponding to missing elements are in bold-faced type.
1 Hydrogen 24 Chromium 47 Silver 70 Ytterbium
2 Helium 25 Manganese 48 Cadmium 71 Lutecium
3 Lithium 26 Iron 49 Indium 72 Hafnium
4 Beryllium 27 Cobalt 50 Tin 73 Tantalum
5 Boron 28 Nickel 51 Antimony 74 Tungsten
6 Carbon 29 Copper 52 Tellurium 75 ——
7 Nitrogen 30 Zinc 53 Iodine 76 Osmium
8 Oxygen 31 Gallium 54 Xenon 77 Iridium
9 Fluorine 32 Germanium 55 Caesium 78 Platinum
10 Neon 33 Arsenic 56 Barium 79 Gold
11 Sodium 34 Selenium 57 Lanthanum 80 Mercury
12 Magnesium 35 Bromine 58 Cerium 81 Thallium
13 Aluminium 36 Krypton 59 Praseodymium 82 Lead
14 Silicon 37 Rubidium 60 Neodymium 83 Bismuth
15 Phosphorus 38 Strontium 61 —— 84 Polonium
16 Sulphur 39 Yttrium 62 Samarium 85 ——
17 Chlorine 40 Zirconium 63 Europium 86 Emanation
18 Argon 41 Niobium 64 Gadolinium 87 ——
19 Potassium 42 Molybdenum 65 Terbium 88 Radium
20 Calcium 43 —— 66 Dyprosium 89 Actinium
21 Scandium 44 Rhuthenium 67 Holmium 90 Thorium
22 Titanium 45 Rhodium 68 Erbium 91 Uranium X
23 Vanadium 46 Paladium 69 Thulium 92 Uranium