[MissDee]

The helium ion, He⁺, has energy levels similar to those of the hydrogen atom, since both species have only one electron. The energy levels of the He+ ion are given by the equation:
E_n = -([5248.16]/[n²])kJ/mole   n= 1, 2, 3,…

Calculate the energies in kJ/mole for the four lowest energy levels of the He⁺ ion.
E₁ = ? kJ/mole
E₂ = ? kJ/mole
E₃ = ? kJ/mole
E₄ = ? kJ/mole


Now, I'm guessing n=2 because that is He⁺'s atomic number.

My book also gave me a very long and complicated looking formula, I'm not sure if this is what I need to use?:
 :delta: e_atom = e_upper - e_lower = e_photon = hc/Y

Other than that, I do not know how to approach this problem and I would like some guidance. Anyone willing to point me in the right direction here?

Thank you in advance.