Carbon,Silicon,and Germanium have 4 valence e | vedclass

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Question

(A) In $Si$ and $Ge$ at room temperature $(300 \ K)$,the energy band gap is relatively small. As a result,electrons in the covalent bonds gain enough

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$Si$ and $Ge$ have a significant number of free electrons for conduction,while $C$ has very few.

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(A) In $Si$ and $Ge$ at room temperature $(300 \ K)$,the energy band gap is relatively small. As a result,electrons in the covalent bonds gain enough thermal energy to break the bonds and move to the conduction band,creating a hole in the valence band.Therefore,the number of free electrons available for conduction is significant in $Si$ and $Ge$.In the case of carbon (diamond),the energy band gap is very high $(5.4 \ eV)$. Consequently,even at room temperature,there are not a significant number of electrons in the conduction band,making it an insulator.

Carbon,Silicon,and Germanium have $4$ valence electrons each. Which of the following statements is true at room temperature?

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