Question by bubba: Question about stable atoms given energy and mass equivalence as per Einstein?
Take a stable Hydrogen atom for example. Is the energy of the electron plus it’s tiny mass equal to the mass/energy of the nucleus?

Best answer:

Answer by odimwitdwon
No.
Where did you get that WRONG idea?
(Since you didn’t state the basis for your silly conclusion that the electron’s energy is equal to the nucleus’s, I can’t directly address your incorrect logic)
the electron is about 1:1850 (if I recall) of the mass of the proton. A nucleus is made up of protons and generally, neutrons. THe electron is bound to the nucleus so it not only has mass-energy, it has potential energy (I’m not sure if it is considered to have kinetic energy when confined – I’d have to think about it)
The proton is also bound to the electron (and in most nuclei bound to other nucleons) and has its own mass. The proton has at least 1800 times the energy of the electron – in an atom.

Add your own answer in the comments!