1. This must be good quality as it is going in your folder.
‘Expert Jigsaw’
Each member of your group is going to look at a different key question about ‘the halogens’.
You will work in your expert group for 5 minutes and then return to your original group, ready to teach them what you have learnt.
Create an team bubble map (on A3 paper) to show your learning from this activity.
This must be good quality as it is going in your folder.
Groups split into 4 lots of 6. Each group is looking at a different key question and will come back to their original group to share

2. Expert 1: The structure and colour of halogens molecules.
Expert 2: Uses and handling halogens.
Expert 3: Physical properties of the halogens.
Expert 4: Reactions of halogens with metals and reactivity

3. Expert 1: The structure and colour of halogens molecules.
(key questions)
How many atoms are there in each molecule?
Draw to diagrams to show how a diatomic molecule can be shown.
Define ‘diatomic’.
How does the colour of the halogens change moving down the group?

4. Expert 2: Uses and handling halogens.
key questions)
What are the halogens used for?
Give examples of how we can say safe whilst handling halogens?

5. Expert 3: Physical properties of the halogens.
(key questions)
How does the MP change moving down the group?
How does the BP change moving down the group?
What is the state if each element at room temperature?

6. Expert 4: Reactions of halogens with metals and reactivity trends.
(key questions)
Write a general equation for the reaction between a halogen and a metal.
Give an specific example of this type of reaction.
What does the pattern described in the source tell you about how the reactivity changes down the group?

7. Rules for teaching others/sharing information
DO NOT INTERRUPT. It is rude.
If you wish to ask a question whilst another member of your group is teaching you, raise your hand.
Make sure everyone in your group has time to ask questions and write information they need in their book
Expert 1 will go first, followed by 2, 3 and 4

8. Hot iron in a jar of chlorine.
Andrew Lambert Photography/Science Photo Library

9. Crystals of the mineral fluorite (calcium fluoride).
Herve Berthoule/Jacana/Science Photo Library

10. Like most non-metals, the halogens are molecular
Like most non-metals, the halogens are molecular. They each consist of diatomic molecules with the atoms joined in pairs: Cl2. Br2 and I2. 10