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The maximum quantum number of electrons ...

The maximum quantum number of electrons that can have principal quantum number, n=3 and spin quantum number `n_(s) = (-1)/(2)` is...........

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The correct Answer is:
5
Maximum number of electrons in a shell with `n = 3 = 2 xx 3^(2) = 18`
`:.` Electrons with `ns = (1)/(2) = 18 xx (1)/(2) = 9`
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