A student compares data for chlorine and iodine. Both substances are made of small molecules.
| Substance | Boiling point in ∘C^\circ\text{C}∘C |
|---|---|
| Chlorine | -34 |
| Iodine | 184 |
The student says, ‘The higher boiling point of iodine shows that the covalent bonds inside iodine molecules are stronger.’
Bromine molecules are larger than chlorine molecules but smaller than iodine molecules.
Evaluate the student's statement. Predict the boiling point range of bromine and justify your prediction.
84 exam-style questions on AQA GCSE Chemistry 2.2 How bonding and structure are related to the properties of substances, covering 2.2.1a The three states of matter, 2.2.1b Limitations of the simple particle model, 2.2.2 State symbols in chemical equations, 2.2.3 Properties of ionic compounds, 2.2.4 Properties of small molecules, 2.2.5 Polymers, 2.2.6 Giant covalent structures, 2.2.7 Properties of metals and alloys, and 2.2.8 Metals as conductors. Each one has a worked solution and a mark scheme showing where the marks go.