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Carbon, silicon and germanium have four ...

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 ))_(G e ) ` .Which of the following statements is true ?
(a) `(E_(g))_(Si) lt ( E_(g))_(Ge ) lt ( E_(g))_(C ) `
(b) `( E_(g))_(C ) lt ( E_(g))_(Ge ) gt (E_(g))_(Si)`
(c ) `(E_(g))_(C ) gt ( E_(g))_(SI) gt ( E_(g))_(Ge ) `
(d) `( E_(g))_(C ) = ( E_(g))_(Si) = ( E_(g))_(Ge ) `

Text Solution

Verified by Experts

The correct Answer is:
c
The energy band-gap is largest for carbon, less for silicon and least for Germanium.
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