Sodium benzoate is a salt composed of sodium and benzoate ions. Sodium is a positively charged ion (cation), while benzoate is a negatively charged ion (anion). When these ions combine to form sodium benzoate, they create an ionic bond, which is a strong electrostatic attraction between oppositely charged ions. This ionic bond results in a polar molecule, meaning that the molecule has a positive end (the sodium ion) and a negative end (the benzoate ion). The polarity of sodium benzoate is important for understanding its solubility, reactivity, and other properties.