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  1. ...up] or [down], it has two different quantum states. Hence quantum numbers of 1/2 and -1/2 are assigned to the spins. Electrons, protons and the like are...

  2. ..., namely s, p, d, f, each of which are assigned an orbital angular momentum quantum number. The...of 3 sub-shells, given magnetic quantum numbers of -1, 0 and +1 to each sub-shell. Each of these...