Question

In a collection of H- atoms, all the electrons jump from n = 5 to ground level finally (directly or indirectly), without emitting any line in the Balmer series. The number of possible different radiations is:

• A. 10
• B. 8
• C. 7
• D. 6

Answer 1

The correct option is D 6

Possible radiations:
When electrons comes tp $n=2$ from $n=3,4,....$, this is known as the Balmer series so we will not consider $n=2$, we consider the following n values $3,4,5$.