Question

81. The total number of valence electrons in 4.2 g
of N;ion is (N. is the Avogadro's number)
(a) 2.1 NA
(b) 4.2 NA
(c) 1.6 N.
(d) 3.2 NA​

Answer 1

Answer:

B

Explanation:

eletrone and neutron same ratio