Q3 of 29 Page 75

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

The centripetal force (Fcentripetal ) 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.

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