The electron population of energy bands of molecular orbital for given group 4A elements has to be sketched. Also the electron population changes in group 4A elements has to be explained. Concept introduction: Valence band: Valence band is defined as valence electron orbital of an element. It is a bunch of orbitals from which electrons shift to conduction band when excitation occurs. Conduction band and valence band are combined together in conductors. In semiconductors, there is a small band gap which separates conduction band and valence band. Conduction band: It is a bunch of orbitals into which electrons shift from valence band when excitation occurs. Electrons present in conduction band are free to move which creates electric current . Band gap: Band gap is the difference in energy between conduction band and valence band. In semiconductors, there is a small band gap which separates conduction band and valence band

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Chapter 21, Problem 21.20CP

Interpretation Introduction

Interpretation:

The electron population of energy bands of molecular orbital for given group 4A elements has to be sketched. Also the electron population changes in group 4A elements has to be explained.

Concept introduction:

Valence band:

Valence band is defined as valence electron orbital of an element. It is a bunch of orbitals from which electrons shift to conduction band when excitation occurs. Conduction band and valence band are combined together in conductors. In semiconductors, there is a small band gap which separates conduction band and valence band.

Conduction band:

It is a bunch of orbitals into which electrons shift from valence band when excitation occurs. Electrons present in conduction band are free to move which creates electric current.

Band gap:

Band gap is the difference in energy between conduction band and valence band. In semiconductors, there is a small band gap which separates conduction band and valence band

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