Question

The number of valence electrons in a sulphide ion, S^2–, is :

(a) 16

(b) 10

(c) 9

(d) 8

Answer 1

(d) 8

Atomic number of a sulphur atom S is 16. It has 6 electrons in its outermost orbit. After gaining 2 electrons it becomes S²⁻. So, now the outermost orbit will have 8 electrons.