The simple Bohr model cannot be directly applied to calculate the energy levels of an atom with many electrons. This is because

Question

Philoid · Accepted Answer

The centripetal force (F_centripetal

) cannot provide the electrostatic force because we know that mass of an electron is negligible as compared to a nucleon also the electrostatic force between electron and nucleus is a central force. So electron can never being subject to a central force in this case.

Therefore option (a) is correct.