Chapter 8.2, Problem 1RC

(a)

Interpretation Introduction

Interpretation: Isoelectronic ion of alkaline earth metal with $Kr$ has to be given.

Concept Introduction:

Alkaline earth metal in the periodic table is also known as Group 2A and contains 2 valence electrons. The outer electronic configuration of Group 2A is ${\text{ns}}^{\text{2}}$.

If two or more different chemical species having same number of valence electrons are known as isoelectronic species

(b)

Interpretation Introduction

Interpretation: An anion with a −3 charge that is isoelectronic with $K^{+}$ has to be given.

Concept Introduction:

Alkaline earth metal in the periodic table is also known as Group 2A and contains 2 valence electrons. The outer electronic configuration of Group 2A is ${\text{ns}}^{\text{2}}$.

If two or more different chemical species having same number of valence electrons are known as isoelectronic species

(c)

Interpretation Introduction

Interpretation: An ion with a +2 charge that is isoelectronic with $C{o}^{3+}$ has to be given.

Concept Introduction:

If two or more different chemical species having same number of valence electrons are known as isoelectronic species