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First 20elements(AM)

Atomic mass of the first 20 elements

Hydrogen 1.01
Helium 4.00
Lithium 6.94
Beryllium 9.01
Boron 10.81
Carbon 12.01
Nitrogen 14.01
Oxygen 16.00
Flourine 19.00
Neon 20.18
Sodium 22.99
Magnesium 24.31
Aluminum 26.98
Silicon 28.09
Phosphorus 30.97
Sulfur 32.07
Chlorine 35.45
Argon 39.95
Potassium 39.10
Calcium 40.08
Created by: de_johnson