What type of bond is represented by potassium chloride?

• A. Covalent bond
• B. Ionic bond
• C. Metallic bond
• D. Hydrogen bond

Answer: (B)

Potassium chloride (KCl) is represented by an ionic bond because it is formed when potassium (K), a metal, transfers an electron to chlorine (Cl), a nonmetal. This transfer of electrons leads to the formation of ions: potassium becomes a positively charged ion (K⁺), while chlorine becomes a negatively charged ion (Cl⁻). The electrostatic attraction between these oppositely charged ions results in the formation of a strong ionic bond.

In contrast, covalent bonds involve the sharing of electrons between atoms, typically between nonmetals, which is not the case for potassium chloride. Metallic bonds occur between metal atoms and involve a 'sea of electrons' that are shared among many atoms, which does not apply to the ionic nature of KCl. Lastly, hydrogen bonds are weak interactions that occur between molecules that have hydrogen atoms bonded to highly electronegative atoms, and these are not relevant in the context of potassium chloride.