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Chemistry
Chemistry Chap 5.2
Question | Answer |
---|---|
the ways in which electrons are arranged into various orbitals around the nucleus | electron configurations |
aufbau principle | electrons occupy the orbitals of lowest energy first |
Pauli exclusion principle | an atomic orbital can describe at most two electrons |
Hund's rule | one electron enters each orbital of a sublevel until all orbitals contain an electron with the same spin direction |
Sublevels of a lower principal energy level may _____ the sublevels of a higher principal energy level | overlap |
Some actual electron configurations differ from the aufbau principal because half-filled and filled sublevels are more _____ than other configurations | stable |
Exceptions to the aufbau principle are due to subtle _________ interactions in orbitals with very similar energy levels. | electron-electron |
Two elements whose electron configurations do NOT follow the aufbau principle are ___ and ___. | Copper and chromium |