I was learning about the quantum model of the electron and how thinking about electrons as standing waves explains orbitals, since certain radii will produce constructive interference and other will produce destructive interference. However, if the circumferences of the energy levels are multiples of the lowest one, does this mean that the De Broglie wavelength of the electron remains constant regardless of energy level, and therefore its magnitude of momentum is constant?
Does this mean that the energy an electron obtains by absorbing a photon does not increase its kinetic energy at all, instead only increasing its electric potential energy as it is pulled farther away from the positive nucleus? Is this need to keep kinetic energy constant why electrons moving between energy levels must absorb specific amounts of energy, whereas electrons escaping a metal through the photoelectric effect or an atom through ionization can absorb any amount of energy above a certain threshold, with the excess becoming kinetic energy?
Would this mean that energy levels are evenly spaced in terms of radius, but the energy needed to move an electron between them decreases as you get farther from the nucleus since the difference in electric potential will diminish as you get further from the nucleus?
Finally, if it is true that the momentum is constant, why? Is there a specific momentum needed? Is it somehow related to the force between the electron and nucleus?