For an electron to be stable requires its understable quarks, each with their own unique structure, to be in equilibrium with its electrosphere. Stability for an electron is different from the stability of a photon. Photons maintain their stability by adjusting their mass and energy measures. Electrons, with their more sophisticated structure, maintain their stability by efficiently ridding themselves of any mass and energy that takes the electron above the specific measures required to remain stable. This is not to say that electrons cannot move far from stability. They can and do but the circumstances have to be extreme for it to happen.

Overstable electrons are rare because electrons are almost always within gravitonstreams which, with their substantial dynamic mass, are a ready source of fresh mass and energy. The most likely way an electron can be overstabilised is for something to collide with it and strip it of much of its electrosphere. If this happens the understable quarks will differentially eject mass and energy as they try to stabilise with a consequent reduction in their mutual rejectivity. The loss of rejectivity could lead to the quarks colliding with what happens next depending on the violence of the collision and the spinrate of the quarks.

Understable electrons are more common. Move an electron from a low dynamic mass gravitonstream to one with a higher dynamic mass and it immediately becomes understable as it absorbs more mass and energy than it is quickly able to eject. Ordinarily it will rapidly restabilise as it attunes itself to the new level of mass and energy intake. However, if the dynamic mass of the gravitonstream is extremely high and long lasting the consequences can be more serious. The already understable quarks would become even more understable with a commensurate increase in their rejectivity. If the rejectivity increased enough, the electron would break apart with the quarks rapidly decaying into other objects.