Element

Isotope

Mass

Isotope

Mass

Hydrogen

¹H

1.007825

²H

2.014102

Carbon

¹²C

12.000000

¹³C

13.003355

Nitrogen

¹⁴N

14.003074

¹⁵N

15.000109

Oxygen

¹⁶O

15.994915

¹⁷O

16.999131

¹⁸O

17.999159

Sulfur

³²S

31.972072

³³S

32.971459

³⁴S

33.967868

Chlorine

³⁵Cl

34.968853

³⁷Cl

36.965903

Bromine

⁷⁹Br

78.918336

⁸¹Br

80.916290