%symbol	name		main mass	avg mass
e	electron	0.0005486	0.0005486
H	Hydrogen	1.007825032	1.007941
D	Deuterium	2.014101778	2.014101778
Li	Lithium		7.016004000	6.940037
C	Carbon		12.000000000	12.010736
N	Nitrogen	14.003074005	14.006743
O	Oxygen		15.994914622	15.999405
Na	Sodium		22.989769670	22.989769670
P	Phosphorus	30.973761510	30.973761510
S	Sulfur		31.972070690	32.066085
Cl	Chlorine	34.968852710	35.452538
K	Potassium	38.963706900	39.098301