distinguish between metal, semiconductor and insulator in terms of energy bands.
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Student Expert
23rd Oct, 2019
Hello aspirant,
In insulators the electrons in the valence band are separated by a large gap from the conduction band , in conductors like metals the valence band overlaps the conduction band , and in semiconductors there is a small enough gap between the valence and conduction bands that thermal or other excitations can bridge the gap.
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