The simple Bohr model cannot be directly applied to calculate the e...

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The simple Bohr model cannot be directly applied to calculate the energy levels of an atom with many electrons. This is because
\( \mathrm{P} \)
(a) of the electrons not being subject to a central force.
W
(b) of the electrons colliding with each other
(c) of screening effects
(d) the force between the nucleus and an electron will no longer be given by Coulomb's law.
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