1. The periodic table

2. Group 1

3. Trends in group 1 metals
What trends do you see as you go down the group?
What do the metals all have in common?
What other properties would you expect the elements in group 1 to have as they are all metals?

5. Group 7 – the halogens
The elements in group 7 of the periodic table, on the right, are called the halogens. I Br Cl F At
fluorine
chlorine
bromine
iodine
astatine

6. Halogens – what do they look like?
Chlorine Bromine
Iodine

7. Halogen vapours
Bromine and iodine are not gaseous, but have low boiling points. This means that they produce vapour at relatively low temperature. They are volatile.
Photo credit: Dr John Mileham
Bromine produces some red-brown vapour, seen here above the liquid bromine in the jar.
When iodine is heated gently, it changes directly from a solid to a gas without first becoming a liquid.
This is called sublimation.

8. Iodine fingerprints

9. Reactions of the group 7 elementsBr Cl F At
fluorine
chlorine
bromine
iodine
astatine

10. Watch the video
You will be asked to put the halogens in order of reactivity

11. Halogens
Chlorine
Iodine
Bromine
Fluorine

13. Group 0 This is also called group 8
How are group 8 elements different to group 1 or 7?