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An electron of hydrogen atom in an excited state is having energy En=-0.85 eV. The maximum number of allowed transitions to lower energy level is .
6
En=- 13.6n2=-0.85 n2=16 n=4
Maximum number of transitions = n(n-1)2= 4 32=6
(4→3, 4→2, 4→1, 3→2, 3→1, 2→1)
Answer: 6
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