. "http://www.iso.org/iso/catalogue_detail?csnumber=31894"^^ . . . "Spin Quantum Number"@en . "s" . . . "The \"Spin Quantum Number\" describes the spin (intrinsic angular momentum) of the electron within that orbital, and gives the projection of the spin angular momentum S along the specified axis" . . . "http://en.wikipedia.org/wiki/Quantum_number"^^ . . "\\(s^2 = \\hbar^2 s(s + 1)\\), where \\(s\\) is the spin quantum number and \\(\\hbar\\) is the Planck constant."^^ .