I've seen the equation I think is just for hydrogen. is this just for hydrogen? of course this doesn't return the atomic spectra, it returns the energy. So using E=h*v and Planck's constant. a simple factor of 1/h would return the frequency. right? Energy is directly proportional to frequency. and E0=13.6eV n1<n2 where both n1 and n2 are integers Is there an equation that models atomic spectra of all atoms?