Chapter 8, Problem 8.94P

(a)

Interpretation Introduction

Interpretation:

The formula and name of the compound formed from $+2$ and $-1$ ions that are isoelectronic with the atom of a chemically unreactive period 4 element is to be determined.

Concept introduction:

The isoelectronic species are the atoms, molecules or ions that have same number of electrons. They differ in their chemical and physical properties. ${\text{Na}}^{+}$, ${\text{Mg}}^{2+}$ and ${\text{Al}}^{3+}$ all have ten electrons so they are isoelectronic species.

(b)

Interpretation Introduction

Interpretation:

The formula and name of the compound formed from $+2$ and $-2$ ions that are isoelectronic with the noble gas of the 3^rd period is to be determined.

Concept introduction:

The isoelectronic species are the atoms, molecules or ions that have same number of electrons. They differ in their chemical and physical properties. ${\text{Na}}^{+}$, ${\text{Mg}}^{2+}$ and ${\text{Al}}^{3+}$ all have ten electrons so they are isoelectronic species.

(c)

Interpretation Introduction

Interpretation:

The formula and name of the compound formed from the $+2$ ion with the smallest filled $d$ sublevel and the anion of the smallest halogen is to be determined.

Concept introduction:

The ions are formed either by loss or gain of electrons from the parent atom. When an electron is removed from the atom, a positively charged ion(cation) is formed. When an electron is added to the atom, a negatively charged ion(anion) is formed.

(d)

Interpretation Introduction

Interpretation:

The formula and name of the compound formed from the ions from the largest and the smallest ionisable atom in 2^nd period is to be determined.

Concept introduction:

The ions are formed either by loss or gain of electrons from the parent atom. When an electron is removed from the atom, a positively charged ion(cation) is formed. When an electron is added to the atom, a negatively charged ion(anion) is formed.