Exams › JEE Advanced › Chemistry
In a hydrogen-like atom sample, electrons make transitions from the 4th excited state (n=5) down to the 2nd state (n=2). Which of the following statements is/are correct?
- 10 different spectral lines are observed
- 6 different spectral lines are observed
- Number of lines belonging to the Balmer series is 3
- Number of lines belonging to the Paschen series is 2
Correct answer: 6 different spectral lines are observed
Solution
Four energy levels (n=2,3,4,5) give C(4,2)=6 spectral lines; 3 fall in the Balmer series and 2 in the Paschen series.
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