I know that electrons do not exist in orbitals, but instead in probability density clouds around the atom. I know that these electrons are quantized and can only have certain energies in the atom. I also know that it is due to the Heisenberg Uncertainty principle that these atoms do not crash into the nucleus and remain at the Bohr radius or farther away from the atom. However, I am having a lot of trouble piecing this all together. Is it that the electron is most likely to be found at the Bohr radius and its probability drops off as you get farther from that point, and does Schrodinger's equation help you find the probability of finding that electron in a specific section of the cloud? I suppose my question really is what the electron probability density says about where you can find the electron in the atom. Also, when the electron absorbs or releases a photon, does it actually "move" in the atom, does its probability density change? Any help would be greatly appreciated!