Write the three postulates of Bohr.s atomic model.

Explanation

1. An electron in an atom could revolve around the nucleus only in certain stable orbits without the emission of radiant energy.
2. An electron revolves around the nucleus only in those orbits for which the angular momentum is an is an integral multiple of `(h//2pi)`, where h is the Planck.s constant.
3. An electron can jump from higher energy orbit to lower energy orbit. In this process a photon is emitted whose energy is equal to the energy difference between the initial and final states.