Hydrogen H 1 1.008
Helium He 2 4.003
Lithium Li 3 6.939
Beryllium Be 4 9.012
Boron B 5 10.811
Carbon C 6 12.011
Nitrogen N 7 14.007
Oxygen O 8 15.999
Fluorine F 9 18.998
Neon Ne 10 20.183