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Sn, C, Si and Ge are all group XIV eleme...

Sn, C, Si and Ge are all group XIV elements . Yet , Sn is a conductor , C is an insulator while Si and Ge are semiconductors . Why?

Text Solution

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The correct Answer is:
A
It all depends on energy gap between valence band conduction band. The
energy gap for Sn is 0 e V , for C is 5.4 eV , for Si is 1.1 eV and for Ge is 0.7 eV.
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