Please please solve this question
Dear student ,
Elements atomic numbers atomic masses
B 5 11
Be 4 9
Si 14 28
C 6 12
P 15 31
N 7 14
K 19 39
Ca 20 40
Li 3 7
He 2 4
Ne 10 20
Regards
Elements atomic numbers atomic masses
B 5 11
Be 4 9
Si 14 28
C 6 12
P 15 31
N 7 14
K 19 39
Ca 20 40
Li 3 7
He 2 4
Ne 10 20
Regards