Question
Q247) Number of spectral lines in Balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom
Q247) Number of spectral lines in Balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom
SOLUTION
As only visible lines have to be calculated i.e. Balmer lines n = 7
∴ Visible lines when ground state = 2
Possible arrangements 7 → 2,
6 → 2,
5 → 2,
4 → 2,
3 → 2
Answer:(a)