Appendix 4. Table of selected atomic weights (2007)
Table App. 4.1. Standard atomic weights (2007) of selected elements, updated from Pure and Applied Chemistry 78, 2051-2066 (2006), with 2007 changes (IUPAC Commission on Atomic Weights and Isotopic Abundances: http://www.chem.qmul.ac.uk/iupac/AtWt/.
Element |
Sym. |
Atomic No. |
Atomic Weight |
Aluminium |
Al |
13 |
26.98154 |
Antimony |
Sb |
51 |
121.760 |
Argon |
Ar |
18 |
39.948 |
Arsenic |
As |
33 |
74.9216 |
Barium |
Ba |
56 |
137.327 |
Beryllium |
Be |
4 |
9.012182 |
Bismuth |
Bi |
83 |
208.9804 |
Boron |
B |
5 |
10.811 |
Bromine |
Br |
35 |
79.904 |
Cadmium |
Cd |
48 |
112.411 |
Caesium |
Cs |
55 |
132.9054519 |
Calcium |
Ca |
20 |
40.078 |
Carbon |
C |
6 |
12.0107 |
Cerium |
Ce |
58 |
140.116 |
Chlorine |
Cl |
17 |
35.453 |
Chromium |
Cr |
24 |
51.9961 |
Cobalt |
Co |
27 |
58.933195 |
Copper |
Cu |
29 |
63.546 |
Fluorine |
F |
9 |
18.9984032 |
Gallium |
Ga |
31 |
69.723 |
Germanium |
Ge |
32 |
72.64 |
Gold |
Au |
79 |
196.966569 |
Helium |
He |
2 |
4.002602 |
Hydrogen |
H |
1 |
1.00794 |
Indium |
In |
49 |
114.818 |
Iodine |
I |
53 |
126.90447 |
Iridium |
Ir |
77 |
192.217 |
Iron |
Fe |
26 |
55.845 |
Krypton |
Kr |
36 |
83.798 |
Lanthanum |
La |
57 |
138.90547 |
Lead |
Pb |
82 |
207.2 |
Lithium |
Li |
3 |
6.941 |
Magnesium |
Mg |
12 |
24.3050 |
Manganese |
Mn |
25 |
54.938045 |
Mercury |
Hg |
80 |
200.59 |
Molybdenum |
Mo |
42 |
95.96 |
Neon |
Ne |
10 |
20.1797 |
Nickel |
Ni |
28 |
58.6934 |
Nitrogen |
N |
7 |
14.0067 |
Osmium |
Os |
76 |
190.23 |
Oxygen |
O |
8 |
15.9994 |
Palladium |
Pd |
46 |
106.42 |
Phosphorus |
P |
15 |
30.973762 |
Platinum |
Pt |
78 |
195.084 |
Plutonium |
Pu |
94 |
[244]† |
Potassium |
K |
19 |
39.0983 |
Radium |
Ra |
88 |
[226]† |
Radon |
Rn |
86 |
[222]† |
Rhodium |
Rh |
45 |
102.90550 |
Rubidium |
Rb |
37 |
85.4678 |
Scandium |
Sc |
21 |
44.955912 |
Selenium |
Se |
34 |
78.96 |
Silicon |
Si |
14 |
28.0855 |
Silver |
Ag |
47 |
107.8682 |
Sodium |
Na |
11 |
22.98976928 |
Strontium |
Sr |
38 |
87.62 |
Sulfur |
S |
16 |
32.065 |
Tantalum |
Ta |
73 |
180.94788 |
Tellurium |
Te |
52 |
127.60 |
Thallium |
Tl |
81 |
204.3833 |
Thorium |
Th |
90 |
232.03806 |
Tin |
Sn |
50 |
118.710 |
Titanium |
Ti |
22 |
47.867 |
Tungsten |
W |
74 |
183.84 |
Uranium |
U |
92 |
238.02891 |
Vanadium |
V |
23 |
50.9415 |
Xenon |
Xe |
54 |
131.293 |
Yttrium |
Y |
39 |
88.90585 |
Zinc |
Zn |
30 |
65.38 |
Zirconium |
Zr |
40 |
91.224 |
†Element has no stable nuclides.