2:05 know the colours, physical states (at room temperature) and trends in physical properties of chlorine, bromine and iodine

ElementColourState at room temp
Chlorine (Cl2)GreenGas
Bromine (Br2)Red-brownLiquid
Iodine (l2)GreySolid

Chlorine is a toxic gas, so should be handled in a fume cupboard.