The table gives information about four elements. Element S is immediately to the right of element R in Period 3. Element U is immediately to the right of element T in Period 4.
| Element | Period | Electronic structure |
|---|---|---|
| R | 3 | 2,8,12,8,12,8,1 |
| S | 3 | 2,8,22,8,22,8,2 |
| T | 4 | 2,8,8,12,8,8,12,8,8,1 |
| U | 4 | unknown |
Predict the electronic structure of an atom of element U.
Give the element expected to have chemical properties similar to element U. Explain your answer.
Elements R and T react with water. Predict which element reacts more vigorously. Use the electronic structures in the table to explain your answer.
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.