The potential energy of two atoms as a function of internuclear distance is shown in the diagram below. Identify the longer bond and the stronger bond.

• A. Bond X—Y is the longer bond. Bond W—Z is the stronger bond.
• B. Bond X—Y is the stronger bond and longer bond.
• C. Bond X—Y is the stronger bond. Bond W—Z is the longer bond.
• D. Bond W—Z is the stronger bond and longer bond.

Answer: (A)