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Quantum Numbers

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Which of the following combinations of quantum numbers can refer to an electron in a ground-state cobalt atom (Z=27) ?
a) n = 3, l = 0, m1 = 2
b) n = 4, l = 2, m1 = -2
c) n = 3, l = 1, m1 = 0

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Which of the following combinations of quantum numbers can refer to an electron in a ground-state cobalt atom (Z=27) ?
a) n = 3, l = 0, m1 = 2
b) n = 4, l = 2, m1 = -2
c) n = 3, l = 1, m1 = 0

n = 1,2,3,4,.... ...

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The solution is provided step-by-step equationally in an attachment. The combination of quantum numbers are discussed.

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