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7.2 Group 7
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Physical properties of the halogens

Physical properties of the halogens

The halogens are the elements in Group 7. Each halogen atom has seven electrons in its outer shell, and the elements exist as diatomic molecules: F2\text{F}_2F2​, Cl2\text{Cl}_2Cl2​, Br2\text{Br}_2Br2​ and I2\text{I}_2I2​.

7.2 Group 7 Lesson

  1. GCSE
  2. /Chemistry
  3. /7.2 Group 7

Step-by-step lessons 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 builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

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