Energy Bands in Solids (Qualitative Ideas Only)

The gap between the valence band and conduction band is known as:

In ______________the conduction band overlaps on the valence band

What is the name of the energy band where free moving electrons reside in a metal.

Define Energy Bands

Energy of the photon of sodium light of wavelength $5890 \stackrel{\circ }{\mathrm{A}}$ equals the energy gap between valence and conduction band of semiconductors. Find the minimum energy $\mathrm{E}$required to create a hole-electron pair.

What type of energy bands are obtained in sodium metal

Draw an energy level diagram for the reaction:

$\mathrm{NaOH}+\mathrm{HCl}\to \mathrm{NaCl}+{\mathrm{H}}_2\mathrm{O}$

$\left(\mathrm{\Delta H}=-57\mathrm{KJ}/\mathrm{mol}\right)$

The nature of bonds present in sodium hydroxide are :

Explain the formation of energy bands in solids. On the basis of energy bands distinguish between a metal, a semiconductor and an insulator.

Illustrate the energy band in sodium metal

Which of the following energy band diagram shows the N-type semiconductor

Fermi energy level for intrinsic semiconductors lies at _____ of the band gap.

Fermi energy level for intrinsic semiconductors lies at middle of the band gap.

Draw energy band diagram of p & n type semiconductors. Also write two differences between p and n type semiconductors. 

Fermi energy level for intrinsic semiconductors lies.

Draw the energy band diagram when intrinsic semiconductor $\left(\mathrm{Ge}\right)$ is doped with impurity atoms of Antimony $\left(\mathrm{Sb}\right)$. Name the extrinsic semiconductor so obtained and majority charge carriers in it.

What is valence band and conduction band ?

For metals conduction band and valence band are​ ;

In a semiconductor, the forbidden energy gap between the valence band and the conduction band is of the order is;

In a metal, the separation between conduction band and valence band is of the order;