Chapter 8, Problem 8.100P

(a)

Interpretation Introduction

Interpretation:

The monoatomic ions formed by $\text{Rb}$ and $\text{Br}$ atoms are to be determined.

Concept introduction:

The atom in its ground state have the tendency to form such ions that lead to the nearest stable noble gas configuration. It can be achieved either by loss or gain of electrons to the parent atom. If an atom loses electron then positively charged ion $\left(\text{cation}\right)$ will be formed and if it gains electrons then negatively charged ion $\left(\text{anion}\right)$ will be formed.

(b)

Interpretation Introduction

Interpretation:

The electronic feature of the pair of ions of $\text{Rb}$ and $\text{Br}$ atoms and the noble gas with which both the ions are related is to be determined.

Concept introduction:

The electronic features of an element refer to the properties that are characteristics of any particular electronic configuration. It includes the magnetic and electrical properties of the elements like paramagnetism, diamagnetism, conductivity, etc.

(c)

Interpretation Introduction

Interpretation:

The pair that best describes the relative sizes of the ions formed by $\text{Rb}$ and $\text{Br}$ atoms is to be determined.

Concept introduction:

Cations are formed by the loss of electrons from the parent atom. The size of cations is always smaller than the parent atom because the number of electrons are lesser in cations than the parent atom so they are held more tightly to the nucleus which results in the smaller size of cations.

Anions are formed by the gain of electrons in the parent atom. The size of anions is always larger than the parent atom because the number of electrons are more in anions than parent atom so they are held less tightly to the nucleus which results in the larger size of the anions.