A row in an early periodic table had six columns. Each column was intended to contain elements with similar chemical properties.
Only five elements for this row were known. The table shows their atomic weights and the columns containing elements with the most similar chemical properties.
| Element | Atomic weight | Column with matching chemical properties |
|---|---|---|
| P | 40 | 1 |
| Q | 44 | 2 |
| R | 48 | 5 |
| S | 51 | 4 |
| T | 56 | 6 |
Use the table to explain how both atomic weights and chemical properties were used to arrange the elements in this row, and how a later discovery could provide evidence for the arrangement.
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.