Polar bonds are formed when there is a difference in electronegativity between two atoms, resulting in partial charges, as seen in molecules like water (H2O). Polar bonds are a subset of polar covalent bonds, which occur when the electronegativity difference is between 0.3 and 1.7. Specifically, a difference of 0.3 to 0.9 indicates a polar bond, while a difference greater than 1.7 typically results in ionic bonds. The degree of polarity is influenced by the specific atoms involved; for example, the carbon-oxygen bond in ethanol is more polar due to oxygen's higher electronegativity compared to carbon. Understanding these distinctions is crucial for grasping molecular behavior and interactions.