[mrmurph3]

Okay so i have been looking at this question for about 2 days now and using all of my notes and resources but i can't find out what n equals. So if somebody could help me understand the concept of it then I think I could do this.

A hydrogen atom in an excited state emits a photon of frequency ν = 2.924 x 1015 s-1. If the electron returns to the ground state, in which level was it before the photon was emitted?
n =

[Borek]

Do you know any equations linking photon energy with electron energy levels?

[opti384]

You have to know the relation between energy and frequency and also the ionization energy in the bohr model.

[Borek]

and also the ionization energy in the bohr model.

No need for that.

[opti384]

Oh I was referring to the equation relating the energy required to make the electron with the energy level. I guess I got jumbled up stuff.