Page 337 - Hydrogeology Principles and Practice

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Symbols, atomic

numbers and atomic Appendix 4

weights of the elements

Atomic number Element Symbol Atomic weight Atomic number Element Symbol Atomic weight

1 Hydrogen H 1.008 36 Krypton Kr 83.80
2 Helium He 4.003 37 Rubidium Rb 85.47
3 Lithium Li 6.939 38 Strontium Sr 87.62
4 Beryllium Be 9.012 39 Yttrium Y 88.91
5 Boron B 10.81 40 Zirconium Zr 91.22
6 Carbon C 12.01 41 Niobium Nb 92.91
7 Nitrogen N 14.01 42 Molybdenum Mo 95.94
8 Oxygen O 16.00 43 Technetium* Tc 97
9 Fluorine F 19.00 44 Ruthenium Ru 101.07
10 Neon Ne 20.18 45 Rhodium Rh 102.91
11 Sodium Na 22.99 46 Palladium Pd 106.4
12 Magnesium Mg 24.31 47 Silver Ag 107.87
13 Aluminium Al 26.98 48 Cadmium Cd 112.41
14 Silicon Si 28.09 49 Indium In 114.82
15 Phosphorus P 30.97 50 Tin Sn 118.69
16 Sulphur S 32.06 51 Antimony Sb 121.75
17 Chlorine Cl 35.45 52 Tellurium Te 127.60
18 Argon Ar 39.95 53 Iodine I 126.90
19 Potassium K 39.10 54 Xenon Xe 131.30
20 Calcium Ca 40.08 55 Caesium Cs 132.91
21 Scandium Sc 44.96 56 Barium Ba 137.33
22 Titanium Ti 47.90 57 Lanthanium La 138.91
23 Vanadium V 50.94 58 Cerium Ce 140.12
24 Chromium Cr 52.00 59 Praseodymium Pr 140.91
25 Manganese Mn 54.94 60 Neodymium Nd 144.24
26 Iron Fe 55.85 61 Promethium* Pm 145
27 Cobalt Co 58.93 62 Samarium Sm 150.35
28 Nickel Ni 58.71 63 Europium Eu 151.96
29 Copper Cu 63.54 64 Gadolinium Gd 157.25
30 Zinc Zn 65.37 65 Terbium Tb 158.93
31 Gallium Ga 69.72 66 Dysprosium Dy 162.50
32 Germanium Ge 72.59 67 Holmium Ho 164.93
33 Arsenic As 74.92 68 Erbium Er 167.26
34 Selenium Se 78.96 69 Thulium Tm 168.93
35 Bromine Br 79.91 70 Ytterbium Yb 173.04