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Can someone explain the pauli exclusion principle? In my notes from lecture I have, "no more than 2 electrons per orbital state, if electrons are in the same orbital then spin paired." I am not exactly sure what this means, I understand spin states but the part with the amount of electrons an orbital can have confuses me.
The spins of two electrons are said to be paired if one is ↑ and the other ↓. Paired spins are denoted ↑↓, and electrons with paired spins have spin magnetic quantum numbers of opposite signs. No two electrons in an atom can have the same set of four quantum numbers.
The s sublevel has 1 orbital, so it can have a max of 2 e-. The p sublevel has 3 orbitals, so it can have a max of 6 e-. The d sublevel has 5 orbitals, so it can have a max of 10 e-. The f sublevel has 7 orbitals, so it can have a max of 14 e-.
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