Chlorine Element Cube

Chlorine's atomic number is 17 and its symbol is Cl. Chlorine is a faint yellow gas at room temperature. Chlorine makes up 50% of the compound known as table salt, along with sodium. Chlorine is commonly used to produce plastics, sanitize swimming pools, and in common disinfectants. High concentrations of elemental chlorine gas are extremely dangerous and poisonous to most living organisms. It was first used as a chemical weapon during WW1.