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How many electrons in an atom have the f...

How many electrons in an atom have the following auantum numbers ?
(i) `n=4, m_(s)=-1/2` (ii) `n=3, l=0`.

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(i) Total electrons in `n=4` are `2 n^(2)`, i.e., `2xx4^(2)=32`. Half of them, i.e., 16 electrons have `m_(s)=-1/2`.
(ii) `n=3, l=0` means 3s orbital which can have 2 electrons.
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