How do models scientists predict the polarity of molecules?

Molecular models are used as didactic tools during understanding the relationship between the structure and the properties of compounds.

Explanation:

The interest in the material, didactic or scientific models allow the representation of the structure of organic compounds and to establish relationships with properties such as, for example, the melting point, boiling point, polarity and solubility. Using models allows scientists to develop a way of thinking that includes at least the main elements of the model, etc.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.