The energy that binds an orbiting electron to the hydrogen nucleus is 13.4 eV. Calculate the ratio of the binding energy per nucleon to the binding energy per electron in deuterium. Which part is held more tightly, the electron or the neutron? I already worked out the average binding energy per nucleon as 1.112 MeV/c^2 in the last question. 1 eV = 1.0*10^6 MeV/C^2 (as per Google), so wouldn't that make the binding energy of an electron much stronger than that of a neutron? Do I have this mixed up?