Question

The energy gap is much more in silicon than in germanium because

• A. It has less number of electrons
• B. It has high atomic mass number
• C. Its crystal has much stronger bonds called ionic bonds
• D. Its valence electrons are more tightly bound to their parent nuclei
• E. Its valence electrons are more loosely bound to their parent nuclei

Hint:

Smaller atoms generally have larger band gaps. As you move down a group in the periodic table, the atomic size increases and the energy gap decreases because valence electrons are further from the nucleus.

Answer 1

The Correct Option is D