An engineer is choosing a material for a fixed-volume component that should have a low mass, remain solid when warmed to 100∘C100^\circ\text{C}100∘C and not react with cold water. The properties of two candidate materials are shown in the table.
| Material | Melting point in ∘C^\circ\text{C}∘C | Density in g/cm3\text{g/cm}^3g/cm3 | Reaction with cold water |
|---|---|---|---|
| A | 98 | 0.97 | reacts vigorously |
| B | 1538 | 7.87 | no reaction |
Which material should the engineer choose? Explain your choice.
91 exam-style questions on AQA GCSE Chemistry 1.3 Properties of transition metals, covering 1.3.1 Comparison with Group 1 elements and 1.3.2 Typical properties of transition metals. Each one has a worked solution and a mark scheme showing where the marks go.