The Man
Unbanned zombie poster
If an alpha particle can fly clean through the QM fluff ball probability clouds of electrons in, say, gold atoms, it can fly through the infinitely thin Mills orbitsphere. Why you think otherwise is a mystery. Or do you think a portion of a vanishingly thin electron orbitsphere is able to stop a speeding alpha particle with over 7000 times the mass of the entire orbitsphere?
Now, the outer orbitsphere of an atom when contacting the outer orbitsphere of another atom in a low energy collision will result in an elastic rebound.
Now picture two fuzzball electron probability clouds similarly contacting each other. It's amazing there are such things are elastic collisions, isn't it?
To help you about the radius of the hydrogen atom, according to QM there is about a 50 percent probability that the electron will be found between .5 and 1.5 times the Bohr radius.
Nope, elastic collisions aren't amazing at all or generally significantly different . That electromagnetic fields can store and release energy is a fundamental part of even just classical electrodynamics. That's where elasticity comes from for elastic materials, the energy stored in and released from the deformation of the inter-molecular electromagnetic fields. Same holds for such 'collisions' (no actual contact between particles is needed). As the similarly charged particles approach energy is stored in the compressed electromagnetic fields slowing the particles. As the particles stop the stored energy reverses (to some degree or other) the particle momentum as the fields release that stored energy and relax again. It holds the same in classical electrodynamics as it does in Quantum electrodynamics. In the latter however those field interactions can be quantified as an exchange of virtual photons.
https://en.wikipedia.org/wiki/Quantum_electrodynamics
And very rapidly too if there is some water or other catalysts present to speed the reaction!