Question

The picture represents bands of MOs for Si. Label valence band, conduction band and band gap.

Answer 1

The bands for Si are labelled as:

- The lower band which is filled is the valence band.

- Valence band is depicted as blue coloured in this case.

- The conduction band is the upper band which is vacant.

- Conduction band is depicted as white coloured with magenta outline in the image.

- Band gap is the energy gap that exists in between of the valence band and the conduction band.

- Band gap is denoted by the two headed arrow in the image.