Chapter 23, Problem 78AP

Interpretation Introduction

Interpretation:

The reason why metal surface develops a color pattern like an oil slick on water, after heating, is to be explained.

Concept introduction:

Metals have a negligible band gap. The gap between the valence band and the conduction band is less in the case of metals. Absorption and emission of light continuously takes place through electronic transitions

Metals are good conductors of heat and electricity.

Metals are malleable, can be rolled into thin foils.

Metals are ductile, can be drawn into thin wires.

Metals are electropositive elements.