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element
symbol
nominal mass
exact mass
abundance %
Hydrogen
H 2 H
1
1.00783
99.99
Carbon
12 C 13 C
12
12.0000
98.91
Nitrogen
14 N 15 N
14
14.0031
99.6
Oxygen
16 O 17 O 18 O
16
15.9949
99.76
Fluorine
F
19
18.9984
100
Silicon
28 Si 29 Si 30 Si
28
27.9769
92.2
Phosphorus
P
31
30.9738
100
Sulphur
32 S 33 S 34 S
32
31.9721
95.02
Chlorine
35 Cl 37 Cl
35
34.9689
75.77
Bromine
79 Br 81 Br
79
78.9183
50.5
Iodine
I
127
126.9045
100
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