The differences in the three forms of bromine shown in the picture is that bromine exists in three physical states: solid, liquid, and gas with differences in their color and boiling point.
Solid bromine is a reddish-brown crystalline solid with a pungent odor. It sublimes at low temperatures, meaning that it changes directly from a solid to a gas without going through a liquid phase.
Liquid bromine is a reddish-brown liquid with a slightly higher density than water. It is a dense, oily liquid that is very reactive. Bromine is soluble in water, but it is not miscible with it.
Gaseous bromine is a reddish-brown gas with a pungent odor. It is heavier than air and is very soluble in water. Bromine is a reactive gas and is a strong oxidizing agent. It can react with many metals to form bromates.