A school technician finds four unlabelled metal samples in a storeroom and needs to know which one must not be put into cold water.
The table shows the melting points and densities of the samples.
| Sample | Melting point in ∘C^\circ\text{C}∘C | Density in g/cm3\text{g/cm}^3g/cm3 |
|---|---|---|
| 1 | 1538 | 7.87 |
| 2 | 1668 | 4.51 |
| 3 | 64 | 0.86 |
| 4 | 419 | 7.14 |
Which sample should be expected to react vigorously with cold water?
Sample 4
Sample 1
Sample 2
Sample 3
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.