Question

The pair, in which ions are isoelectronic with $A{l}^{3+}$ is :-

• A. $B{r}^{-}$and $B{e}^{2+}$
• B. $C{l}^{-}$and $L{i}^{+}$
• C. $S^{2-}$ and $K^{+}$
• D. $O^{2-}$ and $M{g}^{2+}$

Answer 1

Answer: (D)

Isoelectronic species have same no. of electrons $A{l}^{+3},O^{2-},M{g}^{+2}$ all have $10$ electrons.