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Question
Distinguish with the help of diagrams metal conductors, insulators and semiconductors from each other.
Solution
| Metal conductors | Insulators | Semiconductors |
| Metals are good conductors of electricity. | Insulators are nonconductors of electricity. | Semiconductors have conductivity that is intermediate between conductors and insulators. |
| In metal conductors, the conduction band is partially filled and there is no band gap or there is overlapping between the valence band and conduction band. | In insulators, the valence band and conduction band in insulators are separated by a large energy gap called the forbidden zone. | In semiconductors, the valence band is completely filled with electrons, and the conduction band is empty. However, the energy gap between the two bands is smaller than that in an insulator. |
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