My knowledge of chemistry is almost nil - but anyways, I was wondering - what happens when two electrons in the same shell collide? From what I understand is that electrons do not travel in a perfect orbit and randomly wobble a bit. If this is true, then isn't it possible that one electron [in the same shell] wobbles a lot, while one electron wobbles very little. Then, if this is true, the electron that wobbles a lot travels a lesser distance along the path of the orbit as opposed to the electron that doesn't...so at one point they're bound to cross paths and eventually collide. I understand from a book on physics I once read that electrons simply repel...which is what causes the atoms in a floor and the atoms in our feet from going through each other, for example. Yet still, wouldn't the repelling force knock one of the electrons out of its orbit? And if this happened within a valence shell, would that electron simply fly away?