Atomic StructureHard

Question

The wave number of electromagnetic radiation emitted during the transition of electron in between two levels of Li2+ ion having sum of the principal quantum numbers 4 and difference is 2, will be : (RH = Rydberg constant)

Options

A.3.5 RH
B.4 RH
C.8 RH
D.8/9 RH

Solution

so n1 = 3 and n2 = 1.
v = R (3)2 = 8R.

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