A-LevelChemistryChemical bondingOct/Nov 2010Paper 1 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?
Athe charge on the cation
Bthe ratio of the ionic charges
Cthe ratio of the ionic radii
Dthe sum of the ionic charges
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The correct answer is C. This question tests the candidate's understanding of chemical bonding within the Chemistrysyllabus. The examiner's mark scheme requires...
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