Edexcel IGCSE Chemistry · Spec 2.5-2.8C
Group 7: The Halogens & Displacement
The properties and trends of the Group 7 halogens, and displacement reactions.
Chemistry revision video
Group 7: The Halogens & Displacement
Prefer to watch on YouTube? Open this video on YouTube.
Spec 2.5-2.8C
What you need to know
- Describe the halogens and what they look like
- Describe the trend in reactivity down the group
- Explain displacement reactions of the halogens
Active recall
Quick check
Answer each question before opening the answer.
How does reactivity change down Group 7, and why?
It decreases down the group because the atoms get larger, so it is harder to gain an electron.
What happens in a halogen displacement reaction?
A more reactive halogen displaces a less reactive halogen from a solution of its salt.
Chemistry video companion
Keep your notes and exam practice together
The free Chemistry workbook follows every video in specification order.