Chapter 21, Problem 21.22CP

Interpretation Introduction

Interpretation:

Provide MO diagrams for each of the given materials and show the electron populations of the bands.

Concept introduction:

• A conducting metal is a species with no band-gap that results in an incredible conductive material.
• An insulator is a species that has a band-gap that is too large for electrons to be excited to the conduction band from the valence band.
• Doping is the process of increasing the conductivity of a semiconductor by adding small amounts of certain impurities.
• An n-type semiconductor is a semiconductor that is doped with an element with extra electrons which uses the electrons as charge carriers, which are negatively charged.
• A p-type semiconductor is a semiconductor that is doped with an element with less valence electron, which results in charge carriers that are positive holes.

To classify:The electron populations of the MO energy levels for each species.