Chapter 8, Problem 8.44QE

Interpretation Introduction

Interpretation:

The species among $\text{Ar}$, ${\text{K}}^{+}$, ${\text{Ca}}^{2+}$, and ${\text{Y}}^{3+}$ that is not isoelectronic with the rest has to be identified.

Concept Introduction:

Ions are formed by gain or loss of electrons. When an electron is lost from the neutral atom, it forms a positively charged ion called cation. An anion is formed when the neutral atom gains an electron. The group of atoms and ions that consists of the same number of electrons is known as isoelectronic series.