The table below shows some of the elements in Group 7 of the periodic table.
| Group 7 element | Atomic number | Relative atomic mass |
|---|---|---|
| Fluorine | 9 | 19 |
| Chlorine | 17 | 35.5 |
| Bromine | 35 | 80 |
| Iodine | 53 | 127 |
Explain, in terms of their electronic configurations, why these elements are all placed in Group 7 of the periodic table.
106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.