Difference between Valence, Conduction & Forbidden Energy Gap
Valence Band
The electrons in outermost orbit of an atom are known as valence electrons. The bands that contains the valence electrons, called valence band. The valence band is the outermost orbital of an atom. Electrons are unable to attain energy from any external source of electric field in Valence band. Valence band can be partial filled or completely filled.
Conduction Band
The band in which the electron conducts the electricity, known as Conduction Band. The conduction band is the band of electron orbitals that electrons can jump up into from the valence band when excited.
Forbidden Energy Gap
The separation between valence band and conduction band where there is no level for electron is called forbidden gap. Forbidden energy_gap is the difference of energy levels of conduction band and valence band.
Difference between Valence, Conduction & Forbidden Energy Gap
| Valence Band | Conduction Band | Forbidden Energy Gap |
| Large number of free electrons available | Density of the electrons is very low | Electrons are absent in this energy band |
| Electrons are unable to attain energy from any external source of electric field | Electrons can gain energy from the external field of electric field. | Little amount of energy needed for electron shifting |
| Contains the energy levels of valence electrons | Energy band above the valence band known as conduction | Energy gap between the valence band and conduction band |
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