I find the mechanics of the atom are not clear to me. I understand that the Bohr "step" of electrons in orbit is non-applicable anymore, then there is De Broglie's wave theory, this is never built upon. I always find it just mentioned never expanded on, I'm left with basic questions, okay so do we now assume electrons orbit or move around the nucleus in wave-like motions, or perhaps they are stationary and bob/shift back and forth in a mechanic pendulum like manner and we note that it is this action which creates wave-like oscillations (surely not a suggestion which is too absurd). The other question is do they produce different shapes of wave with different amplititudes and frequencies. Does one have to involve the uncertainty principle and elecric forces to resolve this picture?