Complete the paragraph to describe the characteristics of a silicon tetrahydride molecule (sih4). the lewis structure and table of electronegativities are given.

The bonds present in SiH4 are polar due to difference in electronegativity between Silicon and hydrogen

The molecular shape is tetrahedral

the hybridization is sp3

In spite of the polarity of bonds of SiH4, the molecule is non polar due to overall zero dipole moment in the molecule.

The dipole moment is the product of charge and distance between charged particles. It is a vector quantity and thus it is directional

All the four bonds of Si-H are polar however the dipoles of each bond cancel each other and the net dipole is zero

hence the molecule is non polar

So answers are

a) Polar

b) tetrahedral

c) non polar

indium, and thallium have three electrons i think

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.