Final answer:
The degree of polarity of diatomic molecules is directly related to the difference in electronegativity.
Step-by-step explanation:
The degree of polarity of diatomic molecules is directly related to the difference in electronegativity. Electronegativity is a measure of the tendency of an atom to attract electrons towards itself. The greater the difference in electronegativity between the two atoms in a diatomic molecule, the more polarized the bond and the greater the degree of polarity.