Answer :
Gold and copper are both metallic conductors that have resistivity in the range of 2 x 10-².
The semiconductor silicon has a resistivity of 6.4 x 102m.
- Gold and copper are metals whereas silicon is a semiconductor . Metals are good conductors and semi conductors are not as good as metals and hence they have more resistivity. This can be attributed to band gap at the atomic level. The energy gap between valence band and conduction band is very less in metals but considerable more in semiconductors. For conduction to happen, the electrons must move from valence band to conduction band. This is easier in metals and hence resistivity is lesser in metals than in semiconductors.
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