A) \[\text{X=H}{{\text{e}}^{\text{+}}},\,\,\text{n=4}\]
B) \[X=L{{i}^{++}},\,\,n=6\]
C) \[X=H{{e}^{+}},n=6\]
D) \[X=L{{i}^{++}},n=9\]
Correct Answer: D
Solution :
[d] Energy of nth state in hydrogen is same as energy of 3nth state in \[L{{i}^{++}}.\] \[\therefore \,\,\,\,\,\,\,\,3\to 1\] transition in H would give same energy as the \[3\times 3\to 1\times 3\] transistor in \[L{{i}^{++}}.\]
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