Question

Plz can anyone tell me atomic mass of 1-20 elements urgent plz i will mark it brainlist answer

Answer 1

H-1.008
He-4.003
Li-6.941
Be-9.012
B-10.811
C-12.011
N-14.007
O-15.998
F-18.998
Ne-20.180
Na-22.990
Mg-24.305
Al-26.982
Si-28.086
P-30.974
S-32.066
Cl-35.453
Ar-39.948
K-39.098
Ca-40.078