The compound in which cation is isoelectronic with anion is.

Options

A. NaCl
B. CsF
C. NaI
D. `K_(2)S`

Answer

D

Explanation

`K_(2)S` formed by `K^(+)andS^(2-)` ion. We know that atomic number of K is 19 and in `K^(+)` ion its electronic number would be 18 similarly atomic number of S is 16 and in `S^(2-)` ion its electronic number would be 18 so the `K^(+) and S^(2-)` are isoelectronic with each other in `K_(2)S`.