Ionic bonding: theoretical and experimental lattice energy Quiz
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5 questions, one answer each
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1. Which lattice energy shows the strongest ionic bonding?
- A. −3791 kJ mol⁻¹
- B. −650 kJ mol⁻¹
- C. −780 kJ mol⁻¹
- D. +780 kJ mol⁻¹
2. The experimental lattice energy of a compound is much more exothermic than its theoretical value. What does this suggest?
- A. The bonding is purely ionic
- B. The ions are larger than expected
- C. The Born-Haber cycle was not used
- D. The compound has additional covalent character
3. Which ion has the greatest polarising power?
- A. Na⁺
- B. Li⁺
- C. K⁺
- D. Cs⁺
4. Which of these iodides is expected to show the most covalent character?
- A. Potassium iodide
- B. Sodium iodide
- C. Lithium iodide
- D. Caesium iodide
5. Why is the I⁻ ion more polarisable than the F⁻ ion?
- A. It is larger, so its outer electrons are further from the nucleus and held less strongly
- B. It has a higher charge
- C. It has fewer electrons
- D. It has a smaller nucleus