XeF₄ Xenon Tetrafluoride:

First draw the Lewis dot structure:

Electron geometry: octahedral. Hybridization: sp³d²

Next draw the 3D Molecular geometry using VSEPR rules:


Decision:
The geometry of XeF₄ is square planar with symmetric electron region distribution.
Therefore this molecule is nonpolar.

Xenon Tetrafluoride on Wikipedia.

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