Chapter 4, Problem 122CP

(a)

Interpretation Introduction

Interpretation: The ionization energy of the ${\text{F}}_2^{-}$ ion has been given. The various satted questions are to be answered using this given value.

Concept introduction: Bond energy is defined as the amount of energy required to break a chemical bond. It can be determined by the addition of the ionization energy, bond dissociation energy and the electron affinity values.

The bond order is calculated by difference between the anti-bonding electrons and the bonding electrons by two. This can be stated as,

$\text{Bond}\text{order}=\frac{\left[\left(\begin{array}{l}\text{Electrons}\text{in}\\ \text{bonding}\text{orbitals}\end{array}\right)-\left(\begin{array}{l}\text{Electrons}\text{in}\\ \text{anti-bonding}\text{orbitals}\end{array}\right)\right]}{2}$

To determine: The bond energy of ${\text{F}}_2^{-}$.

(b)

Interpretation Introduction

To determine: The difference between the bond energy between ${\text{F}}_2^{-}$ ion and the ${\text{F}}_2^{}$ molecule, on the basis of the molecular orbital theory.