Question: how much energy is required to ionize a hydrogen atom with an electron in the n=5 bohr orbit?
Answer: How much energy is required to ionise a H - atom if the electron occupie n=5 orbit ? Compare your answer with the ionization energy fo H-atom (energy required to remove the electron from n= orbit ). Thus , 0.544eV energy is required to ionise H-atom of electron is in 5th orbit . Also , E5E1=0.54413.6=0.04.