Chlorine, symbol Cl, is a greenish-yellow gaseous element. In group 17 of the periodic table, chlorine is one of the halogens. The atomic number of chlorine is 17. Chlorine is a greenish yellow gas, which combines directly with nearly all elements. It is a gas at normal temperature and pressure, but because it is highly reactive it is not found as a gas in nature. Instead, it appears as naturally occurring organochlorine compounds and salts. It is …showed first 75 words of 611 total…

…showed last 75 words of 611 total…essential role in the survival of these organisms. On land, some 300 natural chlorine-based compounds are known to be produced by terrestrial fungi and plants. These range from the chloromethane released by wood-rotting fungi to complex chlorinated polyacetylenes made by plants of the Aster family. In terrestrial plants, organochlorines often act as anti-feedants to protect the plant from attack by insects or herbivores. So, as you can see, chlorine is a very essential element in life.