First 20 Elements

H
Hydrogen
1.008
He
Helium
4.002602
Li
Lithium
 6.94
Be
Beryllium
 9.0121831
B
Boron
 10.81
C
Carbon
12.011
N
Nitrogen
 14.007
O
Oxygen
15.999
F
Flourine
18.998403163
Ne
Neon
20.1797
Na
Sodium
22.98976928
Mg
Magnesium
24.305
Al
Aluminium
26.9815385
Si
Silicon
28.085
P
Phosphorus
30.973761996
S
Sulfur
32.06
Cl
Chlorine
35.45
Ar
Argon
39.948
K
Potassium
39.0983
Ca
Calcium
40.078
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