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
(1) The four bonding electrons in the case of C lie in the third orbit, whereas for Si they lie in the
fourth orbit
(2) In case of C the valance band is not completely filled at absolute zero temperature
(3) In case of C the conduction band is partly filled even at absolute zero temperature
(4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they
lie in the third
where as Si is intrinsic semiconductor. This is because
(1) The four bonding electrons in the case of C lie in the third orbit, whereas for Si they lie in the
fourth orbit
(2) In case of C the valance band is not completely filled at absolute zero temperature
(3) In case of C the conduction band is partly filled even at absolute zero temperature
(4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they
lie in the third