Number of possible spectral lines which may be emitted in brackett series in H-atom, if electrons in 8th excited state returns to ground state are:

Number of possible spectral lines which may be emitted in Brackett series in H atom, if electrons present in 9^(th) excited level returns to ground level, are

Number of possible sepectral lines which ,may br emitted in bracket series in H atom , if electron present in 9^(th) excited level returns to ground level ,are

In a sample of "H" atom,total number of spectral lines obtained during transition of electron from "4^(" th ")" excited state to ground state is

What is the maximum number of spectral lines emitted by a hydrogen atom when it is in the third excited state ?

Find the number of spectral lines in Paschen series emitted by atomic H, when electron is excited from ground state to 7th energy level returns back .

The number of possible line of Paschen series when electron jumps from seventh excited state up to ground state (in hydrogen like atom) is :

What is the maximum number of spectral lines emitted by a hydrogen atom when it is in the third excited state?