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14 April, 09:30

Which of the following quantum number combinations is not allowed in an atom?

n = 2, l = 0, m subscript l = 0

n = 3, l = 2, m subscript l = - 1

n = 6, l = 5, m subscript l = - 4

n = 1, l = 0, m subscript l = 1

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  1. 14 April, 12:03
    0
    The fourth combination is not allowed.

    The third quantum number, i. e. m subscript l, only may an integer number from - l to + l. Given that l = 0, the only allowed m subscript l is 0.
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