The energy gap between the valence band and the condition band for a material is $6$ eV. The material is?

an insulator

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a metal

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an intrinsic semiconductor

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a superconductor

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Solution

The correct option is A an insulator
Insulators have large energy gap between valence and conduction band (about $6$ eV), while semiconductors have a smaller one and conductors, the smallest energy gap.

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