Question
Which of the following is not permissible arrangement of electrons in an atom?
n = 4, l = 0, m = 0, s = –1/2
n = 5, l = 3, m = 0, s = +1/2
n = 3, l = 2, m = –3, s = –1/2
n = 3, l = 2, m = –2, s = –1/2
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