Skip to content

Course home

x
Sign up
x

Halogens and halide ions

Halogens and halide ions

Summary diagram of fluorine, chlorine, bromine and iodine showing room-temperature states and trend arrows down Group 7 Group 7 is also called Group 17 in modern numbering. Fluorine, chlorine, bromine and iodine are the halogens, and they exist as diatomic molecules such as Cl2Cl_2Cl2​ and Br2Br_2Br2​.

The elements of Group 7 Lesson

  1. A Level
  2. /Chemistry
  3. /The elements of Group 7

Step-by-step lessons on Edexcel A Level Chemistry The elements of Group 7. Each one builds up to exam-style questions. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.

Lessons