From PROF. LENE HAU OFFICIAL YouTube channel:  Electron Never Runs Out of Energy. Why Not?
Why doesn't an electron ever run out of energy? Classical physics predicted every atom in the universe should collapse in trillionths of a second, as orbiting electrons radiate their energy away and spiral into the nucleus. They don't. This video walks through the actual quantum mechanics that solved one of the strangest problems in physics history, from Rutherford's gold foil experiment to Bohr's stationary states, de Broglie and Schrödinger's matter waves, and Heisenberg's uncertainty principle.