Question

Which one of the following is an example of a positive ion and negative ion that is isoelectronic with $F^{-}$?

• A. $S^{2-}$ and $M{g}^{2+}$ or $N{a}^{+}$
• B. $O^{2-}$ and $C{a}^{2+}$ or $K^{+}$
• C. $O^{2-}$ and $M{g}^{2+}$ or $L{i}^{+}$
• D. $O^{2-}$ and $M{g}^{2+}$ or $N{a}^{+}$

Answer 1

The correct option is D

$O^{2-}$ and $M{g}^{2+}$ or $N{a}^{+}$

$F^{-}$ ($10electrons$);

$O^{-2}$ ($10e^{-}$); $M{g}^{2+}$ ($10e^{-}$); $N{a}^{+}$ ($10e^{-}$)