C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulat

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C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulator whereas Si is intrinsic semiconductor. This is because\

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(c) : Electronic configuration of carbon $\left({ }^{6} \mathrm{C}ight)$ is $1 s^{2} 2 s^{2} 2 p^{2}$. The electronic configuration of silicon $\left({ }_{14} \mathrm{Si}ight)$ is $1 s^{2}$ $2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$.\ Hence, the four bonding electrons of C and Si respectively lie in second and third orbit.\