Group 7 - the halogens
Learn these trends:
As you go down group 7, the halogens have the following properties:
1) Less reactive, because it's harder to gain an extra electron as the outer shell's further from the nucleus.
2) Higher melting point
3) Higher boiling point
The halogens are all non-metals with coloured vapours
Fluorine is a very reactive, poisonous yellow gas.
Chlorine is a fairly reactive,…