This relates to a question I asked recently on Quantum Dots, but I'll rephrase it and hopefully any chemists out there can help. If we have (n,l) = (1,2) where n and l are quantum numbers can we determine the orbitals? and hence the number of electrons in a quantum dot? i.e. And also Ive always used the SSPSP.... to fill orbitals, what's happened to the second S etc? why does he go SPDSF Thanks in advance for any help, completely lost.