Chemistry / Unit 6 Chem 1038 short lesson, about 20 seconds
Electron-Pair Geometry
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The idea
Electron-pair geometry describes the arrangement of every electron domain, bonding and lone pair alike, around a central atom.
In practice
Ammonia's central nitrogen has four electron domains, three bonds and one lone pair, giving a tetrahedral electron-pair geometry.
Where people slip
Electron-pair geometry counts every domain including lone pairs — Chem 1040 names the narrower term counting only bonded atoms.
Your place on the trail
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