Question

The number of valence electrons in a sulphide ion, $S^{2-}$, is :

(a) 16

(b) 10

(c) 9

(d) 8

Answer 1

option (d)

The sulfur atom has 6 valence electrons, and when it gains 2 more electrons to form $S^{2-}$, then it has 8 valence electrons.