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Number of electrons with –1/2 spin in the shell with n value 4

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answer is B.

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Detailed Solution

For n = 4 value of electrons is 2n ² = 32
and two electrons is filled in each orbital one have m _s value +1/2 and other have -1/2
So for n = 4 there are 16 orbitals and 16 electrons which have m_s value is -1/2

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