OrbToMultiplicity(orb) tries to interpret the string orb as an atomic orbital and returns the multiplicity of the state (spin included).
OrbList = {"1s","2s","2p","3s","3p","3d","4s","4p","4d","4f","5s","5p","5d","5f","5g","6s","6p","6d","6f","6g","6h","7s","7p","7d","7f","7g","8s","8p","8d","8f","9s","9p","9d","10s","10p","11s","Noodles","Mind the Gap","Barely Used","Stuff","Hug","Test","1s12","2s12","1s1/2","2s1/2","2p1/2","2p3/2","Saturday 5/2","Ephebus 7/2","Nose-in-Fridge 9/2"}
for key,orb in pairs(OrbList) do
print("Multiplicity of \""..orb.."\": "..OrbToMultiplicity(orb))
end
Multiplicity of "1s": 2 Multiplicity of "2s": 2 Multiplicity of "2p": 6 Multiplicity of "3s": 2 Multiplicity of "3p": 6 Multiplicity of "3d": 10 Multiplicity of "4s": 2 Multiplicity of "4p": 6 Multiplicity of "4d": 10 Multiplicity of "4f": 14 Multiplicity of "5s": 2 Multiplicity of "5p": 6 Multiplicity of "5d": 10 Multiplicity of "5f": 14 Multiplicity of "5g": 18 Multiplicity of "6s": 2 Multiplicity of "6p": 6 Multiplicity of "6d": 10 Multiplicity of "6f": 14 Multiplicity of "6g": 18 Multiplicity of "6h": 22 Multiplicity of "7s": 2 Multiplicity of "7p": 6 Multiplicity of "7d": 10 Multiplicity of "7f": 14 Multiplicity of "7g": 18 Multiplicity of "8s": 2 Multiplicity of "8p": 6 Multiplicity of "8d": 10 Multiplicity of "8f": 14 Multiplicity of "9s": 2 Multiplicity of "9p": 6 Multiplicity of "9d": 10 Multiplicity of "10s": 2 Multiplicity of "10p": 6 Multiplicity of "11s": 2 Multiplicity of "Noodles": 2 Multiplicity of "Mind the Gap": 6 Multiplicity of "Barely Used": 10 Multiplicity of "Stuff": 14 Multiplicity of "Hug": 18 Could not interpret orbital "Test" as either relativistic or non-relativistic atomic orbital, returning -1. Multiplicity of "Test": -1 Multiplicity of "1s12": 2 Multiplicity of "2s12": 2 Multiplicity of "1s1/2": 2 Multiplicity of "2s1/2": 2 Multiplicity of "2p1/2": 2 Multiplicity of "2p3/2": 4 Multiplicity of "Saturday 5/2": 6 Multiplicity of "Ephebus 7/2": 8 Multiplicity of "Nose-in-Fridge 9/2": 10