Atom center of mass, although strictly speaking these particles are believed to be point-like and cannot be said to be rotating. Spin is measured in units of the reduced Planck constant (ħ), with electrons, protons and neutrons all having spin ½ ħ, or "spin-½". In an atom, electrons in motion around the nucleus possess orbital angular momentum in addition to their spin, while the nucleus itself possesses angular momentum due to its nuclear spin. The magnetic field produced by an atom—its magnetic moment—is determined by these various forms of angular momentum, just as a rotating charged object classically produces a magnetic
Olaf—An Atom Olaf—An Atom Olaf—An Atom is a 1913 American film directed by Anthony O'Sullivan and featuring Harry Carey. Broken by grief after his mother's death, Olaf becomes a wanderer. He is treated cruelly until he is given a meal by a woman at the homestead where she lives with her husband and baby. Olaf is able to return her kindness when he overhears a plot to rob the settlers of their home. He alerts the couple and delays the would-be thieves long enough for the husband to file a claim on his land. Olaf is injured by the claim jumpers but