Carbon, silicon, and germanium atoms have fou | vedclass

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Question

(A) The energy band gap $(E_g)$ is the energy difference between the conduction band and the valence band. For Carbon (diamond), the energy gap is app

Vedclass · Accepted Answer

$(E_g)_C  >  (E_g)_{Si}  >  (E_g)_{Ge}$

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(A) The energy band gap $(E_g)$ is the energy difference between the conduction band and the valence band. For Carbon (diamond), the energy gap is approximately $5.4 	ext{ eV}$. For Silicon, the energy gap is approximately $1.1 	ext{ eV}$. For Germanium, the energy gap is approximately $0.7 	ext{ eV}$. Comparing these values, we find that $(E_g)_C  >  (E_g)_{Si}  >  (E_g)_{Ge}$. Therefore, the correct relationship is $(E_g)_C  >  (E_g)_{Si}  >  (E_g)_{Ge}$.

Carbon, silicon, and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_g)_C$, $(E_g)_{Si}$, and $(E_g)_{Ge}$ respectively. Which one of the following relationships is true in their case?

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