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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?

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The energy gap for Sn is `eV_(i) ` for C is 5.4 V, for si is 1.1 eV and for Ge is 0.7 eV . So Sn is a conductor C is an insulator and Si and Ge are semi conductor .
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MODERN PUBLICATION-SEMICONDUCTOR ELECTRONICS METERIALS DEVICES AND SIMPLE CIRCUITS -NCERT FILE SOLVED (TEXT BOOK EXERCISES )
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  3. In an intrinsic semiconductor, the energy gap E(g) of an intrinsic sem...

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  9. Can the potential barrier across a p-n junction be measured by simply ...

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