Group 7: Halogens

Fluorine: Gas

Chlorine: Gas

Bromine: Liquid

Iodine: Solid

Astatine: Solid

• Low melting and boling points
• Diatomic molecules
• Boling points increase down the group as there are more van der waals' forces
• One electron fewer than the electronic configuration of a noble gas
• An outer p sub-shell containing five electrons

Halogens are strong oxidising agents removing electrons in a reaction. The oxidising power of a…