BF3 - Boron Trifluoride:

First draw the Lewis dot structure:
BF3 Lewis Structure
Electron geometry: trigonal planar. Hybridization: sp2

Then draw the 3D molecular structure using VSEPR rules:
  Click and drag the molecle to rotate it.

The molecular geometry of BF3 is trigonal planar with symmetric charge distribution on the central atom.
Therefore BF3 is nonpolar.

More info on boron trifluoride (BF3) at wikipedia: Wikipedia Boron Trifluoride.
Back to Molecular Geometries & Polarity Tutorial: Molecular Geometry & Polarity Tutorial.
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