The conduction band and valency band of a good conductors are

The conduction band and valence band in a good conductor

In an good conductor the forbidden energy gap between the between the conduction band and valence band is of the order of

In an insulator the energy gap between the conduction band and valence band is of the order of

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

In a semiconductors the separation between conduction band and valence band is of the order of