<Dl> <Dd> − μ S = − μ B g S S (\ displaystyle - (\ boldsymbol (\ mu)) _ (S) = - \ mu _ (B) g_ (S) \ mathbf (S)), </Dd> </Dl> <Dd> − μ S = − μ B g S S (\ displaystyle - (\ boldsymbol (\ mu)) _ (S) = - \ mu _ (B) g_ (S) \ mathbf (S)), </Dd> <P> with g the electron - spin g - factor (about 2), resulting in a total magnetic moment, μ, </P> <Dl> <Dd> μ = μ L + μ S (\ displaystyle (\ boldsymbol (\ mu)) = (\ boldsymbol (\ mu)) _ (L) + (\ boldsymbol (\ mu)) _ (S)). </Dd> </Dl>

1. energy level of an electron designated by n where n=1 2 3 etc