Question

Mention the theories those accommodate energy
band and how they differ​

Answer 1

Explanation:

Energy band theory is a theory of a valence electron moving in a periodic potential field of a crystalline lattice. Single atoms have a discrete energy spectrum, which means they can occupy only discrete energy levels. Part of these energy levels are filled with electrons in a non-excited condition.

Answer 2

band theory in solid state Physics theoretical model describing the state of electron in solid material that can have value of energy only within certain specific range .the behaviour of an electron in a solid and hence its energy is related to the behaviour of all other particle around it this is a direct contrast to the behaviour of an electron in free space where it may have any specified energy the range of a lot animations of electrons in a solid are called allowed band...

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