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Question

Energy required for the electron excitation in Li++ from the first to the third Bohrs orbit:

A
7.625×1028mev
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B
109ev
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C
8.8×1028mev
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D
56ev
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Solution

The correct option is C 109ev
we know that energy for exitation of eis given as - E=13.6×z2×[1n211n22] For exitation from first orbit (n1=1) to third orbit (n2=3) we get E=13.6×(3)2×[1119]=108.8eVE109eVHence, option (B) is correct.

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