They don't. The repel each other remember - they'll never get close enough to touch ... it is even difficult to say what that would mean at that scale.What happens when 2 electrons collide?
When two electrons collide, they either scatter off of each other or annihilate each other, depending on the circumstances of the collision.
The energy of the electrons plays a crucial role in determining the outcome of the collision. If the energy is high enough, the electrons can annihilate each other and produce other particles. If the energy is lower, they are more likely to scatter off of each other.
Yes, for electrons to annihilate each other, they must collide at a head-on or 180 degree angle. At any other angle, they will scatter off of each other instead.
After a collision, the kinetic energy of the electrons is redistributed between the scattered or newly created particles. Some of the energy may also be converted into other forms, such as light or heat.
Yes, the spin of the electrons can affect the outcome of the collision. Electrons with opposite spins are more likely to scatter off of each other, while electrons with the same spin are more likely to annihilate each other.