octet rule
The 'octet rule' explains the stability of atoms in molecules by achieving a full valence shell, commonly of eight electrons.
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Definition
B2Chemical Bonding
(academic, technical)A principle where atoms tend to achieve a full outer shell of eight electrons through gaining, losing, or sharing electrons.
Example
- According to the octet rule, sodium loses one electron to achieve a stable configuration.
- The octet rule helps explain why chlorine gains an electron when forming compounds.