Chemical Bonding (College Board AP® Chemistry): Exam Questions

Describe how sodium chloride forms in terms of electron transfer.

Explain why sodium chloride has a higher melting point than carbon dioxide.

Explain how the difference in electronegativity between atoms determines whether a bond is ionic or covalent.

The table below shows the bonds found in different molecules.

Identify which bond is the shortest. Justify your answer in terms of bond order.

The bond energy of a C-H bond in methane (CH₄) is 412 kJ/mol, while the bond energy of an H-F bond in hydrogen fluoride (HF) is 565 kJ/mol.

i) Explain why the H-F bond has a higher bond energy than the C-H bond in terms of atomic structure.

ii) Predict whether the bond length in H-F is longer or shorter than in C-H. Justify your answer.