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Question

The atomic spectrum of Li2+ ion arises due to the transition of an electron from n2 to n1. If n1+n2=4 and (n2n1)=2, find the wavelength of 3rd line of this series in Li2+ ion.

A
1.08 nm
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B
10.8 nm
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C
108 nm
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D
1080 nm
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