VSEPR Model

[Tamera Scott 1G]

When doing VSEPR models, there are questions that require you to know whether a molecule is polar or nonpolar. How can you tell?

[Francis_Nguyen3D]

I believe you can determine whether a molecule is color or nonpolar based on its charge distribution.
When you draw the lewis structure, if there is symmetric distribution of charge, then the molecule would be nonpolar.
If you draw the lewis structure and there is an uneven distribution of charge, then the molecule is polar.

[Grace Kim 1J]

A polar molecule occurs when two atoms do not share electrons equally, one in which one end of the molecule has a slight positive charge and the other end has a slight negative charge. This will occur whenever the molecule is not completely symmetric.
Examples of this would be H20, NH3, SO2, H2S, etc.

A molecule that consists of two atoms and is completely symmetric is nonpolar.
In a nonpolar bond, electrons are evenly distributed. There is no net electrical charge across the molecule.
Examples of this would be H2, N2, CO2, C6H6, etc.