# Binding energy of a nucleon virus an electron

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?

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Dick
Homework Helper
It's really mixed up. Why are you dividing energies by c^2? Are you trying to convert to a rest mass? And in any event, 1eV=10^(-6)MeV. The neutron is way stronger bound. Take a stress pill and try to relax.

Ah yes, ^(-6) makes all the difference in the world.

I have divided energies by c^2 because mass and energy are interchangeable as per E=mc^2. The average binding energy is either (kg), (u), or (MeV/c^2).

Using the revised equation, I conclude that the nucleon's average binding energy is approximately 83,000 times stronger than that of the the electron.

Does anyone agree, or disagree?

Last edited:
Dick