At ordinary temperature and pressure, chlorine is because a gas, bromine is a liquid and iodine is a solid because

At ordinary temperature and pressure, among halogens, chlorine is a gas, bromine is a liquid and iodine is a solid. Why?

At ordinary temperature and pressure, among halogens, chlorine is gas, bromine is a liquid, and iodine is a solid, because

At ordinary temperature and presture chloride is a gas bromine a liquid and iodine a solid .This is due to the fact that

In the halogen group, chlorine is a gas, bromine is a liquid and iodine exists as solid crystals. Then the next halogen astatine (At) would be

In the halogen group, chlorine is a gas, bromine is a liquid and iodine exists as solid crystals. Then the next halogen astatine (At) would be