Even though atomic particles cannot be accurately described as orbiting (and spinning) charge distributions of uniform charge-to-mass ratio, this general trend can be observed in the atomic world so that: m = g e 2 μ μ L , where the g -factor depends on the particle and configuration. For example, the g -factor for the magnetic moment due to an electron orbiting a nucleus is one while the g -factor for the magnetic moment of electron due to its intrinsic angular momentum (spin) is a little larger than 2. The g -factor of atoms and molecules must account for the orbital and intrinsic moments of its electrons and possibly the intrinsic moment of its nuclei as well.