Question

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Example 15.1 C. SI and Ge have same lattice structure. Why is
Insulator while Si and Ce intrinsie semiconductors?​

Answer 1

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• The 4 bonding electrons of C, si or Ge lie, respectively , in the second , third and fourth orbit.
• Hence, energy required to take out an electron from these atoms will be least for Ge, followed by Si and highest fir C.
• Hence, number of free electrons conduction in Ge and Si are significant but negligibly small for C.

Answer 2

Answer:

1⃣ The 4 bonding electrons of C, si or Ge lie, respectively , in the second , third and fourth orbit.

2⃣ Hence, energy required to take out an electron from these atoms will be least for Ge, followed by Si and highest fir C.

3⃣ Hence, number of free electrons conduction in Ge and Si are significant but negligibly small for C.