Question

количество протонов,электронов и нейтронов
(O),(Li),(N),(Hg)
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Answer 1

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