Which solid would you expect to have little or no bandgap

Question:

Which solid would you expect to have little or no bandgap?
a. Zn(s)
b. Si(s)
c. As(s)

Answer:

In metal, the band gap is infinitesimally small.

In insulators, the band gap is large.

In semiconductors, the band gap is smaller than that of insulators.

a. Zinc is a metal. So, it has little or no band gap between its valence band and conduction band.

b. Silicon is a semimetal. So, it has smaller band gap between its valence band and conduction band.

c. Arsenic is an insulator. So, it has larger band gap between its valence band and conduction band.

Therefore, the answer is a. Zn(s).

Leave a Comment

Your email address will not be published. Required fields are marked *