Phosphorus Pentachloride - PCl₅ :

First determine the Lewis dot structure:

Electron geometry: trigonal bipyramidal. Hybridization: sp³d

Next determine the 3D molecular geometry with VSPER rules:


Decision:
The molecular geometry of PCl₅ is trigonal bipyramid with symmetric electron region distribution around the central atom.
Therefore this molecule is nonpolar.

Phosphorus Pentachloride on Wikipedia.

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