Which substance has polar covalent bonds?

Question

Quizplus · Accepted Answer

NH₃ (ammonia) has polar covalent bonds due to the presence of a highly electronegative nitrogen atom and three hydrogen atoms with lower electronegativity. The difference in electronegativity between N and H atoms results in a partial positive charge on the hydrogen atoms and a partial negative charge on the nitrogen atom, making the molecule polar. Rn (radon) and F₂ (fluorine) have nonpolar covalent bonds, and Ca₂C (calcium carbide) has ionic bonds.

Which Substance Has Polar Covalent Bonds