Use the equation attached to calculate the energy of E1, E2, E3 and E energy levels of the hydrogen-like boron ion... (refer to attachment) energy levels of the hydrogen-like boron ion B4-.

Express the answer in electrovolts and sketch the energy level diagram. Calculate the energy of the photons corresponding to the lowest energy spectral line that is emitted as a result of transitions down to the E2 energy level of this ion.

Calculate the energy of the lowest energy photon that B4+ could absorb, if it is in its ground state. In no more than a couple of sentences, explain the circumstances in which some hydrogen-like boron ions can absorb photons of even lower energy.