The bond polarities of SiHâ‚„ are polar. The molecular shape is tetrahedral. The molecule is nonpolar.
Explanation
As seen on the diagram, there are four Si-H bonds in a molecule of SiHâ‚„. Electronegativity values:
The two atoms differ in electronegativity. As a result, the Si-H bond is polar.
There are four valence electrons in one Si atom. Each of the four electron will go to a Si-H bond. The Si atom in SiHâ‚„ will have no lone pairs. The four Si-H bonds count towards four electron domains. As a result, the SiHâ‚„ atom is tetrahedral.
Dipoles from each Si-H bond are equal. They are poised in a tetrahedral shape. As a result, their dipole balance each other. Overall, SiHâ‚„ molecule will have no net dipole.
