Chemistry group 7 elements - halogens

Group 7 elements - Halogens

The halogen are all non metals with couloured vapour 

Flourine is very reactive, poisonous yellow gas.

Chlorine is fairly reactive, poisonous dense green gas. 

Bromine is a dense, poisonous red-brown volatile liquid. 

Iodine is daek grey crystalline solid or a purple vapour. 

They all exist as molecules which are pairs of atoms. 

Trends of the Group 7 halogens: 

As you go down group 7 the halogens: 

become less reactive - it is harer to…