Chapter 12, Problem 12.73SP

Interpretation Introduction

Interpretation:

The reason for softer nature of copper than iron should be explained.

Concept introduction:

According to band theory, solids are classified as conductors, semiconductors, and insulators.

As per band theory, bands are a continuum of energy levels. The bands are of two types: valence band and conduction band.

The band that holds valence electrons is called valence band and the band that is slightly higher in energy than valence band is called conduction band. On the basis of band theory, a partly filled band shows conduction and is called conductors, and fully filled band doesn’t show conduction and are insulators.