Now, from what I understand, Bohr's model of the atom is outdated and flawed. But whenever I imagine energy levels, it is the Bohr's model that comes to mind. Do electrons really orbit around the nucleus? I would assume because of classical physics, even though the electron can be on any portion of the "sphere", it is always on that sphere because it does not lose or gain speed. Due to the acceleration from the centripetal force, it would be kept on an orbit, not the orbit like the planets, but I would call it a "mesh". From what I know, then the electron would "jump" to a higher energy level if a force acted upon the electron because its speed increases. Now, what makes it come back down? Is it the attraction from the proton? But that is centripetal force that keeps it at an "equilibrium" so the electron does not fly out. I understand that there is no force other than the centripetal acting upon the electron, it would keep moving at its same speed because of Newton's first law. If it somehow got to a lower level, that extra energy needs to be spit out as a photon. But what causes it to go to a lower level? Also, what determines energy levels? Why are there specific energy levels? Just saying, I am just a high school student, if I got the whole thing wrong because I am trying to used classical physics intuition while trying to understand quantum physics, no need to bash me.