To overcome the drawbacks of the Rutherford’s model , Neil Bohr came forward with his postulates about the model of an atom, which are given below:

(i) The electrons revolve around in circular definite orbits.

(ii) Each orbit corresponds to a fixed energy.

(iii) These orbits are characterized by energy levels which are represented by integers.

(iv) These orbits are represented by the letters: K,L,M,N,… or the numbers, n =1,2,3,4,….

(v) The electrons can move from the lower energy orbits to the higher energy orbits by absorbing the energies and an electron can jump from higher energy levels to the lower energy level by losing energy.