APPENDIX 563 
INTERNATIONAL ATOMIC WEIGHTS* 
O=16 
Name. Symbol. Woute Name. Symbol qigmic 
Aluminium....... Al 27.1 Molybdenum..... Mo 96.0 
Antimony........ Sb 120.2 Neodymium...... Nd 144.3 
Argon........... A 39 .88 Neon..........-. Ne 20.2 
Arsenic.......... As 74 96 Nickel. .......... Ni 58 . 68 
Barium.......... Ba 137 .387 Niton............ Nt 222.4 
Bismuth.......... Bi 208 .0 Nitrogen......... N 14.01 
Boron............ B 11.0 Osmium.......... Os 190.9 
Bromine.......... Br 79.92 Oxygen.......... O 16.00 
Cadmium........ Cd 112.40 Palladium... ..... Pd 106.7 
Caesium.......... Cs 132.81 Phosphorus. ...... P 31.04 
Caleium.......... Ca 40 .07 Platinum......... Pt 195.2 
Carbon.......... Cc 12.00 Potasslum........ K 39.10 
Cerlum........... Ce 140 .25 Praseodymium.... Pr 140.6 
Chlorine.......... Cl 35.46 Radium.......... Ra 226 .4 
Chromium........ Cr 52.0 Rhodium......... Rh 102.9 
Cobalt........... Co 58 .97 Rubidium. ....... Rb 85.45 
Columbium....... Ch 93.5 Ruthenium....... Ru 101.7 
Copper........... Cu 63 .57 Samarium........ sm 150.4 
Dysprosium...... Dy 162.5 Scandium........ Se 44.1 
Erbium.......... Er 167.7 Selenium......... Se 79.2 
Europium........ Ku 152.0 Silicon. .......... Si 28.3 
Fluorine.......... F 19.0 Silver............ Ag 107.88 
Gadolinium....... Gd 157.3 || Sodium.......... Na 23 .00 
Gallium.......... Ga 69.9 Strontium........ Sr 87.63 
Germanium....... Ge 72.5 Sulphur.......... 8 32.07 
Glucinum........ Gl 9.1 Tantalum........ Ta 181.5 
Gold..........4.. Au 197.2 Tellurium........ Te 127.5 
Helium........... He 3.99 Terbium......... Tb 159.2 
Holmium......... Ho 163.5 Thallium......... Tl 204.0 
Hydrogen........ H 1.008 || Thorium......... Th 232.4 
Indium........... In *| 114.8 Thulium........, Tm 168.5 
Todine........... I 126 .92 6 Sn 119.0 
Tridium.......... Ir 193.1 Titanium......... Ti 48.1 
Tron. ....... 0.0. Fe 55.84 Tungsten......... WwW 184.0 
Krypton......... Kr 82.92 || Uranium......... U 238.5 
Lanthanum....... La 139.0 Vanadium........ V 51.0 
Lead............. Pb 207 .10 Xenon.......-.-- xe 130.2 
Lithium.......... Li 6.94 Ytterbium........ Yb 172.0 
Lutecium......... Lu 174.0 (Neoytterbium) 
Magnesium....... Mg 24.32 Ytterium......... Yt 89.0 
Manganese....... Mn 54.98 VA Zn, 65.37 
Mercury ........ Hg 200.9 Zirconium........ Zr 90.6 
* Compiled by the International Committee on Atomic Weights consisting of F. W. Clarke, 
W. Ostwald, T. E. Thorpe, and G. Urbain. 
