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Question

What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state?


A

21

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B

15

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C

6

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D

10

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Solution

The correct option is B

15


The number of lines produced when an electron from the nth shell drops to the ground state is n(n1)2

So the required number of emission lines is 6(61)2=15


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