Question

How energy bands are formed in solid? Distinguish between metals, insulators and semiconductors on the basis of energy bands diagram .

Answer 1

Answer:

insulators the electrons in the valence band are separated by a large cap for the conduction band and conductors like metals the valence band overlaps the conduction band and semiconductors there is a small enough gap between the valence and conduction bands the thermal or other excitations can bridge the gap.