Elements R and Q react to form a solid compound.
| Element | Type of element | Electronic structure of atom |
|---|---|---|
| R | metal | 2,8,1 |
| Q | non-metal | 2,6 |
Three students each built a model of a small section of the solid compound. The table shows the number of particles of R and of Q in each model.
| Model | Number of R particles | Number of Q particles |
|---|---|---|
| A | 8 | 4 |
| B | 6 | 6 |
| C | 4 | 8 |
Use the information in both tables. Describe the electron changes that happen when atoms of R react with atoms of Q. Use these changes to identify which model, A, B or C, has the correct ratio of particles and to give the empirical formula of the compound. Then describe the structure and bonding in the solid compound.
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.