system
Given the following post, respond as if you're commenting on Reddit:
human
If electrons are attracted to protons, then what keeps them apart?

Sorry if it's a stupid question but no one has ever explained that to me.
gpt
This is not a stupid question at all! It was historically very important to figure out why the electron doesn't just crash right into the proton. One short answer is that quantum mechanics finally comes to the rescue.

Edit: please let us know if you are interested in a more detailed explanation, etc...