In which of the solids semiconductors, conductors or insulators) do conduction band and valence band overlap ?

In an semiconductor the separation between conduction band and valence band is of the order of

The valence band at 0 K is-

In a good conductor, what is the energy gap between the conduction band and the valence band.?

Give two examples of each of conductor insulator and semiconductor.

Draw energy band diagram of conductors, semiconductors and insulators.

Write any two distinguishing features between conductors, semiconductors and insulators on the basis of energy band diagrams.

Give band gap Eg value for conductor, Insulator and semiconductor

Distinguish between a conductor , a semiconductor and an insulator on the basis of energy band diagrams.

Assertion : The electrons in the conduction band have higher energy than those in the valence band of a semiconductor Reason : The conduction band lies above the energy gap and valence band lies below the energy gap.

In terms of band theory, what is the difference between a. a condcutor and an insulator b. a conductor and a semiconductor