History and Current Status of the Plastics Industry
... electron can be in each orbit due to alternating spins.
• Energy levels appear at predictable intervals in disctict
orbits or shells, e.g., 1s (2 electrons), 2s (2 electrons) and 2p
(6 electrons), 3s, 3p, etc.
• s, p, f, and d are Quantum Levels 1, 2, 3, and 4
• Vertical groupings in periodic table ...