Lithium oxide has the empirical formula Li2O\text{Li}_2\text{O}Li2O.
Four students each built a model of part of a lithium oxide lattice. The table shows the number of each type of ion in each model.
| Student | Number of Li+\text{Li}^{+}Li+ ions | Number of O2−\text{O}^{2-}O2− ions |
|---|---|---|
| Amir | 9 | 18 |
| Beth | 14 | 7 |
| Chloe | 11 | 11 |
| Dev | 10 | 9 |
Which student's model has the correct ratio of ions for lithium oxide?
Amir's model
Beth's model
Chloe's model
Dev's model
98 exam-style questions on AQA GCSE Chemistry 2.1 Chemical bonds, ionic, covalent and metallic, covering 2.1.1 Chemical bonds, 2.1.2 Ionic bonding, 2.1.3 Ionic compounds, 2.1.4 Covalent bonding, and 2.1.5 Metallic bonding. Each one has a worked solution and a mark scheme showing where the marks go.