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

Options

A. of the electrons not being subject to a central force
B. of the electrons colliding with each other
C. of screening effects
D. the force between the nucleus and are electron will no longer be given by Coulomb's law.

Answer

A

Explanation

Because in an atom having many electrons, alongwith the Colombian force exerted on a given electron by nucleus, other electrons also provide variable Colombian forces on a given electron and so resultant Colombian force exerted on it does not remain central force. Hence, simple Bohr model is not applicable in this case.