Please tell me the difference between valence band and conduction band?

Dear Mahima,

 Following are the diffreences: 

 VALENCE BAND:

1. In this band there are valence electrons.

2. This band may be partially or completely filled with electrons.

3. In this band the electrons are not capable of gaining energy from external electric field.

4. The electrons in this band do not contribute to electric current.

5. In this band there are electrons of outermost orbit of atom which contribute in band formation.

CONDUCTION BAND:

1. In this band the electrons are rarely found.

2. This band is either empty or partially filled with electrons.

3. In this band the electrons can gain energy from electric field.

4. Electrons in this band contribute in this band contribute to electric current.

5. In this band there are electrons which are obtained on breaking the covalent bands.

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differentiate conduction band and valence band