Discussion
The geometry of a molecule of type AB3E2 with 3 bonding pairs and 2 lone pairs is
Answer: A
An AB3E2 molecule is T-shaped.
Five electron pairs around the central atom adopt a trigonal bipyramidal arrangement. The two lone pairs occupy equatorial positions, where they have the most room, leaving the three bonding pairs in a T. ClF3 is the standard example.
Trigonal bipyramidal is the arrangement of all five pairs, not the shape of the atoms. See-saw is AB4E, square pyramidal is AB5E, and trigonal pyramidal is AB3E with four pairs.
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