Glossary 1.2

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The glossary provides definitions and explanations of key terms and concepts essential to understand the topic in the lesson. Be sure to familiarize yourself with each term before attempting the lesson glossary quiz.

Browse the glossary using this index

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A

Aufbau Principle

the theory that an atom is "built up" by the addition of electrons, which fill orbitals starting at the lowest available energy orbital before filing higher energy orbitals (for example, 1s before 2s)