The Aufbau principle | Atomic structure and properties | AP Chemistry | Khan Academy
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The Aufbau principle | Atomic structure and properties | AP Chemistry | Khan Academy
Keep going! Check out the next lesson and practice what you’re learning: https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:atomic-structure-and-electron-configuration/v/valence-electrons The Aufbau principle states that electrons fill lower-energy atomic orbitals before ...
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Atoms | Middle school chemistry | Khan Academy
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