SeF6 - Selenium Hexafluoride:
First draw the Lewis dot structure:
Electron geometry: octahedral. Hybridization: sp3d2
Then draw the 3D molecular structure using VSEPR rules:
The molecular geometry of SeF6 is octahedral with symmetric charge distribution on the central atom.
Therefore this molecule is nonpolar.
Selenium Hexafluoride on Wikipedia.
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