Valence and Conduction Band

In an insulating material, _______.

• the valence band is filled and the conduction

  band is empty

• the valence band is empty and the

  conduction band is filled

• both the valence band and conduction band

  are empty

• both the valence band and conduction band

  are filled

• both the valence band and conduction band

  are partially filled

A material with 5 eV forbidden gap energy is:

• conductor

• An insulator

• A semiconductor

• An isolated molecule

• An isolated atom

A material with a relatively large gap between its

valance band and conduction band would be

expected to be ______.

• a good conductor

• easily melted

• a poor conductor

• in the liquid state

• crystalline material

According to the band theory of solids, why is lead

a good conductor?

• There is a wide energy gap between the

  valance band and conduction band of lead

• The valance band of lead is empty and the

  conduction band is filled

• The valance band and the conduction

  band of lead is half filled.

• A great deal of energy is needed to move

  valence electrons of lead to the conduction

  band

• The conduction band of lead overlaps the

  valance band

Tags

NGSS.HS-PS1-3

What is the approximate energy gap between the

valance band and conduction band of insulators?

• 0 eV

• 1 eV

• 5 eV

• 10 eV

• 100 eV

________ is an insulator.

• Copper

• Silicon

• Gold

• Table salt

• Germanium