A student places equal-sized pieces of sodium and element T in the same volume of water at the same temperature. Element T is in Group 1 and Period 4. The student records the time taken for each metal to disappear.
| Metal | Time taken to disappear (s) |
|---|---|
| Sodium | 42 |
| T | 19 |
What do the results show about the reactivity of T compared with sodium?
Explain your answer in terms of electronic structure.
82 exam-style questions on AQA GCSE Chemistry 1.2 The periodic table, covering 1.2.1 The periodic table, 1.2.2 Development of the periodic table, 1.2.3 Metals and non-metals, 1.2.4 Group 0, 1.2.5 Group 1, and 1.2.6 Group 7. Each one has a worked solution and a mark scheme showing where the marks go.