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(D) The classification of materials based on energy band theory is as follows:$1$. Conductors: The valence band and conduction band overlap, or the en

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insulator

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(D) The classification of materials based on energy band theory is as follows:$1$. Conductors: The valence band and conduction band overlap, or the energy gap is negligible.$2$. Semiconductors: The energy band gap is small, typically around $1 \ eV$ (e.g.,$Si \approx 1.1 \ eV$, $Ge \approx 0.7 \ eV$).$3$. Insulators: The energy band gap is very large, typically greater than $3 \ eV$.Since the given bandgap is $5.0 \ eV$, which is significantly greater than $3 \ eV$, the material is classified as an insulator.

If the bandgap between the valence band and conduction band in a material is $5.0 \ eV$, then the material is

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