Chapter 8, Problem 85E

Interpretation Introduction

Interpretation:

The reason as to why calcium fluoride has the formula ${\text{CaF}}_{\text{2}}$ and not ${\text{Ca}}_{\text{2}}\text{F}$ or $\text{CaF}$ , in terms of ionization energy and electron affinity is to be explained.

Concept introduction:Ionization energy is the energy required to remove an electron from the outermost valence shell of an isolated gaseous atom to form a cation whereas in electron affinity, there is a formation of negative ion when an electron is added to a neutral atom and here the amount of energy is released or spent.

To determine:The reason as to why calcium fluoride has the formula ${\text{CaF}}_{\text{2}}$ and not ${\text{Ca}}_{\text{2}}\text{F}$ or $\text{CaF}$ , in terms of ionization energy and electron affinity.