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The number of spectral lines that are po...

The number of spectral lines that are possible when electrons in 7th shell in different hydrogen atoms return to the 2nd shell is:

A

12

B

15

C

14

D

10

Text Solution

Verified by Experts

The correct Answer is:
B
Number of spectral lines `=((n_(2)-n_(1))(n_(2)-n_(1)+1))/(2)`
`=((7-2)(7-2+1))/(2)=15`
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