Question

An electron of hydrogen atom jumps from 5th shell to 2nd shell. The number of spectral lines expected to be formed is : 1) 4 2) 8 3) 10 4) 6

Answer 1

Explanation:



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Answered

Find the number of spectral lines obtained when electron de-excites from 5th to the 1st energy level but no line is seen in balmer series ?

Asked by arunavamitra50 | 18th Jun, 2018,  06:35: PM

Expert Answer:

If the electron jumps from n2 = 5 to n1 = 1 then following are the transitions possible.

5→ 4

5→ 3

5→ 2

5 → 1

4 → 3

4→ 2

4→ 1

3 → 2

3→ 1

2 → 1

Hence there are 10 transitions and hence 10 spectral lines possible.

The general formula for the number of spectral lines emitted is