Two unlabelled samples, A and B, are sealed in containers. One sample is a Group 1 metal and the other sample is a transition metal.
The table shows the results of tests on the samples.
| Sample | Density in g/cm³ | Melting point in °C | Result of hardness test |
|---|---|---|---|
| A | 0.9 | 80 | Easy to scratch |
| B | 8.0 | 1500 | Difficult to scratch |
Explain which sample is the transition metal. Use all the data in the table.
Predict how the reactions of samples A and B with water would differ when equal-sized pieces are added separately to water. Give a reason for your answer.
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.