According to Band Theory, an Insulator Is a Material Which

Multiple Choice

According to band theory, an insulator is a material which has a(n) ____ valence band, a(n) ____ conduction band, and a ____ gap between them.

A) completely filled; completely filled; wide
B) empty; partially filled; narrow
C) partially filled; partially filled; wide
D) partially filled; empty; narrow
E) partially filled; empty; wide