Question

3. Explain conductance of metals according to band theory​

Answer 1

Answer:

Metals' ability to conduct electric current comes from the proximity of theconduction and valencebands - insulators, or ineffective conductors of electricity, have a considerably greater gap between thebands, requiring more energy to move electrons to an area with a greater range of movement.

Answer 2

Answer:

1)Metals' ability to conduct electric current comes from the proximity of the conduction and valence bands - insulators, or ineffective conductors of electricity, have a considerably greater gap between the bands, requiring more energy to move electrons to an area with a greater range of movement.

2)Metals conduct electricity with the help of valence electrons present in them. The atomic orbitals of the metals having the same energy combine to form molecular orbitals which are close in energy to each other so as to form a band.

3)Band Theory for Electrical Conductivity

When a number of atoms are brought together, the electrons of one atom experience forces of other atoms. This effect is most pronounced in outer most orbits. Due to this force, the energy levels, which were sharply defined in an isolated atom, are now broadened into energy bands.

4)Band theory is a quantum model in solid state physics which gives the possible energies for electrons in a solid and gives an understanding of electrical conductivity. It comes from the theory of molecular orbitals. ... Solids have a band structure: there are allowed energy bands and forbidden energy bands.

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