Fun fact : gold has its distinctive color due to quantum mechanics and the electron's speed around the nucleus. https://en.m.wikipedia.org/wiki/Relativistic_qu

Fun fact : gold has its distinctive color due to quantum mechanics and the electron's speed around the nucleus. https://en.m.wikipedia.org/wiki/Relativistic_quantum_chemistry https://en.m.wikipedia.org/wiki/Relativistic_quantum_chemist...