Define Band Theory .

Explain the electrical conductivity of a semiconductor with the help of band theory.

Explain the electrical non-conductivity of an insulator with the help of band theory.

Based on band theory, explain why metals are good conductors of electricity, while insulators are non-conductors of electricity.

Explain with the help of band theory why a semiconductor is neither a good conductor nor a good insulator.

Define an atom in view of Dalton's theory.

In terms of band theory, what is the difference (i) between a conductor and an insulator (ii) between a conductor and a semiconductor.

With the help of band theory explain (i) inability of an insulator to conduct electricity and (ii) the electrical conductivity of a semiconductor.

Compare the properties of conductor, semiconductor and insulator in the light of band theory

Explain the limitations of VB theory.

Who proposed Histogen Theory?