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Band theory of solids, a brief introduction - class-XII
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Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to $(E _g) _C,, (E _g) _{Si}$ and $(E _g) _{Ge}$.Which of the following statements is true?
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A
$(E _g) _{C}\, >\, (E _g) _{Si}\, >\, (E _g) _{Ge}$
💡 Explanation:
For given elements, the energy band gap of carbon is the maximum and of germanium is the least.
Hence option C is correct.