Write Bohr’s postulates for the hydrogen atom model.

1.	Write Bohr’s postulates for the hydrogen atom model.
Answer» First Postulate: Electron revolves round the nucleus in discrete circular orbits called stationary orbits without emission of radiant energy. These orbits are called stable orbits or non-radiating orbits. Second Postulate: Electrons revolve around nucleus only in such orbits for which the angular momentum is some integral multiple of (h/2π). Third Postulate: When an electron makes a transition from one of its non-radiating orbits of another of lower energy, a photon is emitted having energy equal to the energy difference between the two state. The frequency of the emitted photon is the given by, h_v = E_i – E_f

Answer»

First Postulate: Electron revolves round the nucleus in discrete circular orbits called stationary orbits without emission of radiant energy. These orbits are called stable orbits or non-radiating orbits.

Second Postulate: Electrons revolve around nucleus only in such orbits for which the angular momentum is some integral multiple of (h/2π).

Third Postulate: When an electron makes a transition from one of its non-radiating orbits of another of lower energy, a photon is emitted having energy equal to the energy difference between the two state. The frequency of the emitted photon is the given by, h_v = E_i – E_f

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