Carbon, silicon, and germanium have four valence electrons each.

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) , (E_g)_si and (E_g)_Ge .

Which of the following statements is true?

(a) (E_g)_Si < (E_g)_Ge < (E_g)_c

(b) (E_g)_c < (E_g)_Ge < (E_g)_Si

(d) (E_g)_c = (E_g)_Si = (E_g)_Ge

Carbon, silicon, and germanium have four valence electrons each.

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