O: e = 8, p=8, n= 16-8=8
Li: e = 3, p=3, n= 7-3=4
N: e = 7, p=7, n = 14-7=7
Hg: e= 80,p=80,n= 200-80= 120
O: e = 8, p=8, n= 16-8=8
Li: e = 3, p=3, n= 7-3=4
N: e = 7, p=7, n = 14-7=7
Hg: e= 80,p=80,n= 200-80= 120