Violation of the Octet Rule
The Northwestern University's Holmgren Laborato
ry defines the octet rule as "Ato
ms will lose, gain or share electrons to
achieve the electron configuration of the nearest noble gas." With the single exception of helium, which has only two electrons, the number is eight (an octet). Where it can exist, an octet of electrons imparts great stability and lower reactivity. There are instances, how
ever, in which an octet cannot form, i.e. the octet rule is "violated."
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