Group 7 and Physical Properties
Group 7 and Physical Properties
Group 7 contains the halogens fluorine, chlorine, bromine and iodine. They exist as diatomic molecules, meaning each molecule contains two atoms, such as Cl2\text{Cl}_2Cl2 or Br2\text{Br}_2Br2. Their reactivity decreases in the order fluorine > chlorine > bromine > iodine.
Step-by-step lessons covering AQA GCSE Chemistry 1.2.6 Group 7 for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.
