Semiconductors are materials that can conduct electricity but not as well as metals. Semiconductors form an energy gap between the filled and empty states, much like the energy gap between bonding and antibonding orbitals.
Occupied bonding molecular orbitals → valence band
Unoccupied antibonding molecular orbitals → conduction band
These two bands are separated by the energy band gap Eg.
Two solids are shown below. One is a semiconductor and one is an insulator.
Which one is which? Explain your reasoning.
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