Total number of spectral lines when electron jumps from `8^( th )` orbit to `2^( nd )` orbit

The number of spectral lines produced when an electron jumps from 5^(th) orbit to 2^(nd) orbit in the hydrogen atom is.

The angular momentum of electron in a Bohr orbit of "H" atom is (3h/ pi) What is the wave number in multiples of rydberg constant , R_(H) of the spectral line when an electron jumps from this orbit to 2^(nd) orbit?

The total number of spectral lines obtained when an electron jumps, from n = 5 to n =1 in a sample of hydrogen atoms.

In H atom when electron jumps from 1s to 2s orbital,

Number of spectral lines in Balmer series when an electron retrurn from 7 ^(th ) orbit to 1 ^(st) orbit of hydrogen atom are

when an electron jumps from the fourth orbit to the second orbit, one gets the

If r_n is the radius of n^(th) orbit of hydrogen atom , then the relative change in the radius, when an electron jumps from n^(th) orbit to (n-1)^(th) orbit is (ngtgt1)

If an electron jumps from 1 st orbital to 3 rd orbital, than it will.