Question

How many maximum spectral lines are possible if the electron is present in the 4th shell and only two atoms are present in the sample?

• A. 6
• B. 4
• C. 3
• D. 2

Answer 1

The correct option is B 4

The maximum number spectral lines possible is 4. 3 spectral lines are obtained for the transition $4\to 3\to 2\to 1$ and one spectral line is obtained for any one of the following transition $4\to 1$ or $4\to 3\to 1$ or $4\to 2\to 1.$