How do you find the geometry of #SiH_4# using the VSEPR method?
Given that silicon has 4 valence electrons, and each hydrogen contributes 1 electron, there are 8 valence electrons, and thus there are 4 electron pairs to be distrbuted around the central silicon atom.
And if there are 4 electron pairs, the geometry is based on a tetrahedron, i.e. each
And thus silane,
Note that you probably know the geometry of methane,