Hi everyone I have to questions which I don't have an answer to: 1. the solution for the Schrödinger's equation are continous (for time aswell as for the location). But why do I get discrete values for the energies for example (let's say in hydrogen) ? 2. Is there a spherical harmonic where the probabilty is unequal to zero when |r|=0 ? (probabilty to be in the core of the atom) to 1. I'm not sure but my guess would be it has to do with Bohrs postulates. The electron is a standing wave in order not to crash into the core, so that's why we have discrete values. 2. I'd say no, but I can't argue against it. I mean maybe theres a difference between the maths and the intuition. Thanks for your help.