BrF₃ Bromine Trifluoride:

First draw the Lewis dot structure:

Electron geometry: trigonal bipyramidal. Hybridization: sp³d

Then draw the 3D molecular structure using VSEPR rules:


Decision:
The molecular geometry of BrF₃ is T-shaped with asymmetric charge distribution about the central atom.
Therefore this molecule is polar.

Bromine Trifluoride on Wikipedia.

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