Which type of bond generally has the highest bond energy?

• A. Triple bond
• B. Double bond
• C. Single bond
• D. Quadruple bond

Answer: (A)

Bond energy rises with bond order, because more sharing of electrons between the two atoms strengthens the connection and pulls the nuclei toward each other more tightly. A triple bond involves three shared electron pairs—one sigma bond and two pi bonds—so there are three connections holding the atoms together. That extra sharing makes the bond harder to break than a double bond (two shared pairs) or a single bond (one shared pair). In typical molecules, breaking a triple bond requires more energy than breaking a double or a single bond, making it the strongest among these common covalent bonds. Quadruple bonds do exist in some special cases, but they’re rare in ordinary chemistry, so triple bonds are generally the strongest bond you’ll encounter in a standard context.