Quantum Numbers, Energy Levels and Orbitals (II)
There are traditional “names” given to “? ”, so that ? =0 = s, ? =1 = p, ? =2 = d, l=3 = f. They stood for (s)harp, (p)rinciple, (d)iffuse and (f)undamental.
The third quantum number is m?, where again, the “?” is written usually as “script ?”.