Weights and Isotope Ratios

Hydrogen (actual mass)

1.00783

Deuterium (actual mass)

2.01410

Carbon (actual mass)

12.0000

Carbon 13 (actual mass)

13.00336

Nitrogen (actual mass)

14.0031

Nitrogen 15 (actual mass)

15.0001

Oxygen (actual mass)

15.9949

Oxygen 17 (actual mass)

16.9991

Oxygen 18 (actual mass)

17.9992

Fluorine (actual mass)

18.9984

Silicon (actual mass)

27.9769

Silicon 29 (actual mass)

28.9765

Silicon 30 (actual mass)

29.9738

Phosphorus (actual mass)

30.9738

Sulfur (actual mass)

31.9721

Chlorine (actual mass)

34.9689

Chlorine 37 (actual mass)

36.9659

Bromine (actual mass)

78.9183

Bromine 81 (actual mass)

80.9163

Iodine (actual mass)

126.9045

Carbon 13 relative abundance

1.08%

Nitrogen 15 relative abundance

0.38%

Oxygen 17 relative abundance

0.04%

Oxygen 18 relative abundance

0.20%

Silicon 29 relative abundance

5.10%

Silicon 30 relative abundance

3.35%

Chlorine 37 relative abundance

32.5%

Bromine 81 relative abundance

98.0%