Hi forum! I've always had a few useless ponderings: -Most articles I've read about classic vs. quantum physics say that, according to classic physics, electrons should spiral into and stick to their nucleus but I don't see why that would be. It seems to me that they would go through their nucleus, acquiring a very high momentum as they got close to it(since you can't say two points actually collided) and then lose the same amount of momentum gained as it went away from it. This would repeat. Take into account the higher mass of the nucleus (it would hardly move relative to the electron) and you have what looks like an electron orbiting its nucleus. This is, of course, according to classic physics. -How do neutrons manage to stay in the nucleus? I was wondering: if neutrons have no charge, how do we know they exist. I found that there are other forces that affect particles with no charge, such as gravity. So how do neutrons manage to stay in the nucleus if they don't behave exactly like protons? Also, I thought it would be nice for some reason if you multiply a subatomic particle's mass by its charge (either 1 or -1) to get a different kind of mass and think about them like that. But alas... Note that I'm just thinking about my textbook to hard. thanks for reading!