Question

Carbon, silicon and germanium have four valence electrons each. At room temperature,

Answer 1

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Answer 2

Answer:

In Si and Ge at room temperature(300K) ; the energy band gap is low as the result of which electrons in the covalent bonds gain kinetic energy, they break the bond and move to conduction band. A hole is also created in the valence band. So the number of free electrons for conduction is significant in Si and Ge. The energy band gap in case of carbon is high as the result of which there are not significant number of electrons in the conduction band even at room temperature

Explanation:

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