BeF₂ Beryllium Difluoride:

First draw the Lewis dot structure:

Electron geometry: linear. Hybridization: sp

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

Decision:
The molecular geometry of BeF₂ is linear with symmetric charge distribution on the central atom.
Therefore BeF₂ is nonpolar.

More info on beryllium difluoride: Beryllium Difluoride at Wikipedia.
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