Chapter 4.5, Problem 5QQ

Interpretation Introduction

Interpretation:

The atom that is isoelectronic with ion ${\text{O}}^{\text{2-}}$ has to be chosen among the given options.

Concept Introduction:

Isoelectronic species:

Ions or atoms that have the same number of electrons are called isoelectronic species.

Example: ${\text{O}}^{\text{2-}}{\text{,F}}^{\text{-}}{\text{,Na}}^{\text{+}}{\text{,Mg}}^{\text{+}}{\text{.Al}}^{\text{3+}}$ all have same configuration i.e., ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}$ are isoelectronic.