Difficulty lies in the fact that each electron interacts not only with the
positively charged nucleus but also with all other electrons The formulation of Bohr model involves electrical force between
positively charged nucleus and electron It does not include the
electrical forces between electrons which necessarily appear in
multi-electron atoms (ii) While the Bohr’s model correctly predicts the frequencies of the light
emitted by hydrogenic atoms, the model is unable to explain the
relative intensities of the frequencies in the spectrum