SiH₄ - Silicon Tetrahydride, better known as Silane:

First draw the Lewis dot structure:

Electron geometry: tetrahedral. Hybridization: sp³

Then draw the 3D molecular structure using VSEPR rules:


Decision:
The molecular geometry of SiH₄ is tetrahedral with symmetric charge distribution around the central atom.
Therefore this molecule is non-polar.

Silicon Tetrahydride on Wikipedia.

Back to Molecular Geometries & Polarity Tutorial: Molecular Geometry & Polarity Tutorial.

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