Do electrons really move around the nucleus in an orbit? Or we cannot say that because of quantum rules which say that we can only locate a electron at a position with certain probability? If it does revolve, then: 1) where is the energy coming to make the electron go around the nucleus? 2) if electron revolves, and since it is a charge particle, it will create magnetic field and in effect will eventually radiate with certain energy? How long can it really last?