ATOMIC DATA 483 



Table 595 



INTERNATIONAL ATOMIC WEIGHTS, ATOMIC NUMBERS AND VALENCIES 



Quoted from the 1st Report of the Committee on Atomic Weights of the International 

 Union of Chemistry (Journ. Amer. Chem. Soc, 3, 1637, 1931). 



Aluminum. 

 Antimony. 

 Argon .... 

 Arsenic . . . 

 Barium . . . 



Beryllium. . 

 Bismuth . . . 



Boron 



Bromine . . . 

 Cadmium. . 



Calcium. 

 Carbon . 

 Cerium. 

 Cesium . 

 Chlorine. 



Chromium. . 

 Cobalt ...... 



Columbium. . 



Copper 



Dysprosium . 



Erbium 



Europium. . . 

 Fluorine. . . . 

 Gadolinium. . 

 Gallium 



Germanium 



Gold. 



Hafnium. . . 

 Helium .... 

 Holmium. . . 



Hydrogen 

 Indium. . 

 Iodine. . . 

 Iridium . . 

 Iron 



Krypton .... 

 Lanthanum. . 



Lead 



Lithium 



Lutecium . . . 



Magnesium. . 

 Manganese. . 

 Mercury .... 



Symbol 



and 

 atomic 

 number 



Al 

 Sb 

 A 



As 33 



Ba 56 



Be 4 



Bi 83 



B 5 



Br 35 

 Cd 48 



Ca 20 



C 6 



Ce 58 



Cs 55 



CI 17 



Cr 24 

 Co 27 

 Cb 41 

 Cu 29 

 Dy 66 



Er 68 

 Eu 63 

 F 9 

 Gd 64 

 Ga 31 



Ge 32 



Au 79 

 Hf 72 

 He 2 

 Ho 67 



H 1 



In 49 



I 53 

 Ir 77 

 Fe 26 



Kr 36 

 La 57 

 Pb 82 

 Li 3 

 Lu 71 



Mg 12 

 Mn 25 

 Hg 80 



Relative 

 atomic 

 weight 

 oxygen 

 = 16 



Valencies 



26.97 

 121.76 



39-944 



74-93 

 I37-36 



9.02 ■ 



209.00 

 10.82 

 79.916 



112. 41 



40.08 

 12.000 



140.13 



132.81 

 35-457 



52.01 

 58-94 

 93-3 

 63-57 

 162.46 



167.64 

 152.0 

 19.00 



157-3 

 69.72 



72.60 

 197.2 

 178.6 



4.002 

 163-5 



1.0078 

 1 14.8 

 126.932 

 I93-I 



55-84 



82.9 

 138.90 

 207.22 



6.940 

 i75-o 



24.32 



54-93 

 200.61 



3 



3- 5 

 o 



3- 5 

 2 



2 



3- 5 



3 



1 



2 



2 

 4 



3- 4 

 1 

 1 



2, 3. 6 

 2. 3 

 5 



1. 2 

 3 



3 

 3 

 1 



3 

 3 



4 



1. 3 



o 

 3 



1 



3 

 1 



4 



2, 3 



o 

 3 



2, 4 

 1 



3 



2 



2, 3. 7 



i- 2 



Element 



Molybdenum. 

 Neodymium . 



Neon 



Nickel 



Nitrogen 



Osmium 



Oxygen 



Palladium. . . . 

 Phosphorus. . . 

 Platinum 



Potassium .... 

 Praseodymium 



Radium 



Radon 



Rhenium 



Rhodium 



Rubidium . . . . 

 Ruthenium . . . 

 Samarium 

 Scandium . . . . 



Symbol 



and 

 atomic 

 number 



Selenium Se 34 



Silicon . 

 Silver 

 Sodium . . . 

 Strontium , 



Sulphur . . . 

 Tantalum . . 

 Tellurium. . 

 Terbium . . . 

 Thallium. . . 



Mo 42 

 Nd 60 

 Ne 10 



Ni 28 

 N 7 



Os 76 

 O 8 

 Pd 46 



P 15 

 Pt 78 



K 19 



Pr 59 



Ra 88 

 Rn 86 

 Re 75 



Rh 45 

 Rb 37 

 Ru 44 

 Sm 62 

 Sc 21 



Relative 

 atomic 

 weight 

 oxvgen 

 = 16 



Valencies 



Thorium. 

 Thulium. 

 Tin.. .. .. 



Titanium. 

 Tungsten. 



Uranium. . 

 Vanadium. 

 Xenon . . . . 

 Ytterbium. 

 Yttrium. . . 



Zinc 



Zirconium . 



Si 14 

 Ag 47 

 Na 11 

 Sr 38 



S 16 

 Ta 73 

 Te 52 

 Tb 65 

 Tl 81 



Th 90 

 Tm 69 

 Sn 50 

 Ti 22 

 W 74 



U 92 



V 23 

 Xe 54 

 Yb 70 



Y 39 



Zn 30 

 Zr 40 



96.0 

 144.27 

 20.183 

 58.69 

 14.008 



190.8 



1 6.000c 

 106.7 



31.02 

 195-23 



39.10 

 140.92 

 225.97 

 222 

 186.31 



102.91 



85-44 

 101.7 



150.43 

 45.10 



79.2 



28.06 



107.880 



22.997 



87.63 



32.06 

 181.4 



127-5 

 159-2 

 204.39 



232.12 

 169.4 

 118.70 

 47.90 

 184.0 



238.14 

 50.95 

 130.2 



173-5 

 88.92 



6538 

 91.22 



4-6 



3 

 o 



2, 3 



3. 5 



6, 8 

 2 



2. 4 



3, 5 

 2. 4 



1 



3 

 2 

 o 



3 

 1 



6, 8 



3 



3 



2, 4, 6 



4 

 1 

 1 

 2 



2, 4, 6 



5 



2, 4, 6 



3 



1. 3 



4 

 3 



2, 4 

 4 



6 



4,6 



3- 5 

 



3 

 3 



2 



4 



Smithsonian Tables 



