Which of the following elements has the small | vedclass

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(D) The energy gap (band gap) is the energy difference between the valence band and the conduction band. For conductors,the gap is zero or negligible.

Vedclass · Accepted Answer

$Ge$

Vedclass · Answer

(D) The energy gap (band gap) is the energy difference between the valence band and the conduction band. For conductors,the gap is zero or negligible. For semiconductors,the gap is small (typically $0.5 \ eV$ to $3 \ eV$). For insulators,the gap is very large. Among the given options: $B$ (Boron) is a metalloid/non-metal with a large gap. $Zn$ (Zinc) is a metal,but in the context of solid-state band theory,$Ge$ (Germanium) is a well-known semiconductor with a small band gap of approximately $0.67 \ eV$. $Cl$ (Chlorine) is a non-metal insulator with a very large gap. Therefore,$Ge$ has the smallest energy gap among the choices provided.

Which of the following elements has the smallest energy gap?

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