Electron Repulsion
Most recent answer: 08/23/2011
Q:
Why can't we pile up bunch of electrons (say 10) around a single proton--i.e., around hydrogen atom? I know that the number of electrons is limited by the shell number i.e., 2n^2 where n is the shell number. Is the number of electrons limited by the number of protons? What is the formula? It seems to me that a single proton should be able to keep a number of electrons in orbit just as a single planet that can keep several same-sized planets as long as they are symmetrically centered on one planet.
- Mehran (age 60)
Miami, FL
- Mehran (age 60)
Miami, FL
A:
Hi Mehran- the answer to this one is pretty simple. After the first electron is bound, the atom is neutral. So there's no net attraction of the next electron when it's at a big distance. Since the electron wave functions can adjust to each other to minimize energy, one more electron can still bind with net negative energy. (see ) However, now you have a negatively charged object which strongly repels any additional electrons. At this point, a classical guess that no more could bind would be correct.
Gravity is very different, because all the forces are attractive.
Mike W.
Gravity is very different, because all the forces are attractive.
Mike W.
(published on 08/23/2011)