SiH4 - Silicon Tetrahydride, better known as Silane:

First draw the Lewis dot structure:
Silane SiH4 Lewis Structure
Electron geometry: tetrahedral. Hybridization: sp3

Then draw the 3D molecular structure using VSEPR rules:

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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