MPSC PYQScience

If the valence shell of an element has only one electron having the following set of quantum numbers: n = 2, l = 0, m = 0, s = +1/2, then the element is _______.

A.Lithium
B.Beryllium
C.Boron
D.Hydrogen

Correct answer: A

Source paper

MPSC Group C Combined Pre 2022 (English)

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