1.

C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because, …….

Answer»

in case of C the valence band is not completely filled at absolute ZERO temperature .
in case of C the CONDUCTION band is partly filled even at absolute zero temperature.
the four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si theylie in the third.
the four bonding electrons in the case of C lie in the third orbit, whereas for Si theylie in the fourth orbit.

Solution :the four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si theylie in the third.
Elecronic configurationof `""_(6)C`
`1S^(2), 2s^(2)2p^(2)`
Electronic configuration of `""_(14)Si`
`1s^(2), 2s^(2)2p^(6), 3s^(2)3p^(2)`


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