SF6 - Sulfur Hexafluoride:

First draw the Lewis Structure:
SF6 Lewis Structure
Electron geometry: octahedral. Hybridization: sp3d2

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

The molecular geometry of SF6 is octahedral with a symmetric charge distribution around the central atom.
Therefore this molecule is nonpolar.

Sulfur Hexafluoride on Wikipedia.
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