(a) What is the ground state energy of the electron in a hydrogen atom expressed in units of electron volts (eV)?
(b) What is the ground state energy (eV) of He+ and Li+2 ions?
(c) How many times larger is the spacing between the energy levels with n=3 and n=4 than the spacing between the energy levels n=8 and n=9 for the one electron beryllium species?