Final answer:
The polarity of a chemical bond is determined by the difference in electronegativity between the two atoms involved in the bond.
Step-by-step explanation:
The polarity of a chemical bond is determined by the difference in electronegativity between the two atoms involved in the bond. Electronegativity is the measure of an atom's ability to attract electrons toward itself in a bond. If the electronegativity difference is large, the bond is considered polar, and if the electronegativity difference is small, the bond is considered nonpolar.