VSEPR: geometry of ammonia
What is the molecular geometry of NH3?
Answer C: explanation for every choice
A
Tetrahedral is the electron geometry, which counts the lone pair.
B
Trigonal planar requires three bonding pairs and no lone pairs, as in BF3.
C
Correct. Three bonding pairs and one lone pair give a tetrahedral electron geometry and a trigonal pyramidal molecular shape.
D
Bent geometry has two bonding pairs and one or two lone pairs, as in H2O.
TakeawayElectron geometry counts lone pairs. Molecular geometry describes only the atoms.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID cp46.