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
The History and Adventures of an Atom idea of atoms, the ideas of Democritus—though, of course, he is also being satirical. The book was published anonymously in 1769. Smollett's authorship of the book has been disputed, but it is generally included and discussed among his works. Writing in 1821, Sir Walter Scott wrote, "The chief purpose of the work (besides that of giving the author the opportunity to raise his hand, like that of Ishmael, against every man) is to inspire a national horror of continental connexions." The History and Adventures of an Atom The History and Adventures of an Atom, by Tobias Smollett, is a novel