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Need explanation for: The maximum number of emission lines when the excited electron of an H atom in n=5 drops to the ground state?

The maximum number of emission lines when the excited electron of an H atom in n=5 drops to the ground state?

  • Option 1)

    15

  • Option 2)

    10

  • Option 3)

    20

  • Option 4)

    5

 
Answers (1)
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As learnt in

Paschen , Bracket and Pfund Series spectrums -

Infrared Region

-

 

 Each different transition of the electron results in a different emission line. So, as far the figure 5

 

The figure contains all possible transitions. 

\therefore possible emission lines (max.) = 10


Option 1)

15

This solution is incorrect.

Option 2)

10

This solution is correct.

Option 3)

20

This solution is incorrect.

Option 4)

5

This solution is incorrect.

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