The SU(2) model has multiplets characterized by a quantum number J, which is the total angular momentum. Each multiplet consists of 2 J + 1 substates with equally-spaced values of J z, forming a symmetric arrangement seen in atomic spectra and isospin. This formalizes the observation that certain strong baryon decays were not observed, leading to the prediction of the mass, strangeness and charge of the Ω baryon.