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Octet Rule

Definition

A chemical rule of thumb that states atoms tend to combine in such a way that they each have eight electrons in their valence shells, making them as stable as noble gases.

Related terms

Valence Electrons: The electrons present in the outermost shell of an atom which take part in bonding. These are the "items" you're packing into your suitcase!

Lewis Dot Structure: Diagrams that show the bonding between atoms and lone pairs of electrons that may exist in a molecule. It’s like a map showing where all your items (electrons) are packed inside your suitcase (atom).

Noble Gases: Elements with full electron shells which make them very stable and unreactive. They’re like perfectly packed suitcases ready for any trip!

"Octet Rule" appears in:

Subjects (1)

  • AP Biology

Study guides (2)

  • AP Chemistry - 1.8 Valence Electrons and Ionic Compounds

  • AP Chemistry - 2.5 Lewis Diagrams

Practice Questions (4)

  • Which of the following is an exception to the octet rule?

  • Which of the following is an exception to the octet rule?

  • Which of the following is an exception to the octet rule?

  • Which of the following is an exception to the octet rule?

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About Us

About Fiveable

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Terms of Use

Privacy Policy

CCPA Privacy Policy

Resources

Cram Mode

AP Score Calculators

Study Guides

Practice Quizzes

Glossary

Cram Events

Merch Shop

Crisis Text Line

Help Center

© 2024 Fiveable Inc. All rights reserved.

AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.