Chlorine is a halogen element. It is the seventeenth element in the classification. It is a gas (Cl-Cl) under ambiant temperature and atmospheric pression. His atomic weight is 37.5g/mol. His oxydation number are +- 1,3,5,7
It is an atom with 17 protons and falls in group 17 or halogen of the periodic table. Free chlorine atoms usually combine in duel to form chlorine molecules.
