system
Given the following post, respond as if you're commenting on Reddit:
human
Why do electrons form pairs if they repel each other?
gpt
It is due to the fact that even though electrons have negative charge they are bound to the nucleus by the attraction force from the nucleus and thus they have to somehow be around the nucleus and at the same time be in the lowest possible energy situation. This is done by pairing of the electrons which have opposite spins. The spin can either be +1/2 or -1/2 and so when 2 electrons form pairs they are as such they are of opposite spins to maintain the overall energy of the system (nucleus+ electrons/ electron cloud) to the minimum and be stable.