I´m not sure, but think it is like with bound planets in orbit about the sun in circular orbit |PE|= 2|KE|but as PE is negative the total energy is -KE. (why bound) A planet in elliptical orbit has this same relationship averaged over the full orbit, but when near the sun both PE & KE magnitudes increase so the total energy is unchanged. I´m not sure it makes any sense to speak about how the KE & PE vary over the electron´s orbits,* but if it does, the energy total is conserved but except for hydrogen the nuclear attraction force, if it makes any sense to speak of that, is more complex than simple 1/(r^2) for electons that penetrate thru deeper shells. *With the Bohr wave length POV I stated in post 28, about the orbitals, I tend to think there is little sense in speaking of the elctron´s speed, KE etc. I.e. I think of the orbital more like static clouds of charge with probability density varying in space.