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Which of the following sets of quantum numbers is not allowed ?

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$n = 3, l = 2, m_{l} = 0, s = + \frac{1}{2}$

$n = 3, l = 2, m_{l} = - 2, s = + \frac{1}{2}$

$n = 3, l = 3, m_{l} = - 3, s = - \frac{1}{2}$

$n = 3, l = 0, m_{1} = 0, s = - \frac{1}{2}$

answer is C.

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Detailed Solution

Azimuthal quantum number (l) always can have maximum value (n-1)

l = 0, 1,2…… (n – 1)

∴ for n = 3

l = 0, 1, 2

⇒ l = 3,

not possible for n = 3

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