1.

The quantum number of four electrons are given below:I. n = 4, l = 2, ml = -2, ms = -1/2II. n = 3, l = 2, ml = 1, ms = +1/2III. n = 4, l = 1, ml = 0, ms = +1/2IV. n = 3, l = 1, ml = 1, ms = -1/2The correct order of their increasing energies will be:

A. IV < III < II < I
B. I < II < III < IV
C. IV < II < III < I
D. I < III < II < IV
Answer» D. I < III < II < IV


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