Chlorine: Difference between revisions

Chlorine is one of the elements that has the atomic number 17, and the symbol Cl.  In the periodic table, it is in group 17.  There is plenty of chlorine in nature.  Most living things on the Earth are in need of chlorine in order to survive, including humans.  When chlroine is in the form of gas, its color becomes greenish yellow, and the weight of it increases as heavy as half of air.  The chlroine gas is also, unlike sulfur, has suffocating odor and very poisonous to every living thing.  However, when it changes its form to the form of solid or liquid, it loses its characters that it had when it was in the form of gas, but is used as a powerful disinfecting agent.