3 ms·

Is this actually physically correct? I was under the impression that "width of an electron" isn't something we have a good value for, if it's a meaningful quant

• swombat 17y ago
  You're right. The electron is a point particle. It has no size (though, interestingly, it has angular momentum - i.e. it spins on itself. Go figure). I guess the page is intended to render the distance between the proton and the electron rather than the size relationship between the two. On the other hand, even that is somewhat dubious. Electrons aren't located in a single place, they can be anywhere within a certain area, according to their probability density function - including right in the middle of the proton, though the probability of that is low.