In insulators (CB is conduction band and VB is valence band )

in insulatore (C.B. is conduction band and V.B. is a valence band)

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

The conduction band overlaps with the valence band in

The conduction band and valence band in a good conductor

The electrons in the conduction band and valence band are respectivley called

Number of electrons = Number of holes in conduction band and valence band. So that solid is

Explain the formation of energy bands in solids and hence define conduction band and valence band.

If the distance between the conduction band and valence band is 1eV, then this combination is