A-LevelChemistryChemical bonding9701/12 · Oct/Nov 2010 · Q31 Mark

The table gives the radii, in pm, of some ions. [1 pm = 10⁻¹²m] ion radii Na⁺ 102 Mg²⁺ 72 Cs⁺ 167 Cl⁻ 181 O²⁻ 140 Caesium chloride, CsCl, has a different lattice structure from both sodium chloride, NaCl, and magnesium oxide, MgO. Which factor appears to determine the type of lattice for these three compounds?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Athe charge on the cation

Bthe ratio of the ionic charges

Cthe ratio of the ionic radii

Dthe sum of the ionic charges

✓ Correct answer

C: the ratio of the ionic radii

Oracle Prep sorts past-paper questions by topic, so you can drill Chemical bonding and see which topics are most likely to come up next.

Topic: Chemical bonding, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2010 Paper 1 Variant 2, question 3.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content