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.[http://en.wikipedia.org/wiki/Main_Page]

Chlorine is usually found combined in nature because of its reactivity. It is ready to use commercially by passing electricity through a water solution of sodium chloride or through molten sodium chloride. Chlorine gases are made up of diatomic molecules, as the formula C12. The gas can be smelled in the air at a 3 parts per million(ppm), and it is irritating to the nose, mouth, and lungs. Thus, it cause throat irritation at 15 ppm, coughing at 30 ppm, and cause deadly effect a few deep breaths at 1,000 ppm.

Chlorine salts are liquefy in the hydrosphere instead of being spread out in the lithosphere.  NaCl, sodium chloride is the most commom element of alkali metals in the hydrosphere as well as in the lithosphere. Thus, it's named commom salt. The average concentration in seawater is approximately 2,6%. Table salt is unreplaceable function in human diet and the uneven distribution of its deposits over the earth's crust has played an original role in conditioning the pattern of civilization in time and space.

In 1774, '''Karl Wilhelm Scheele''' discovered Chlorine. Scheels thoguth that chlorine was an oxie of murium, or hydrochloric acid. Scheeles experienced to heat manganese dioxide and hydrochloric acid. From this experiment he discoverd greenish, yellow gas, called chlorine. However, Scheeles did not place chlorine as an element. In 1810, '''Humphrey Davy''' named chlorine and established as an element. It was named after the Greek word chloros, which means pale green.

Chlorine was first introduced as a weapon during the World War I by the Germans on April 22, 1915. Even chlorine weapon were failed because they were not invented well, but some of chlorine are more dangerous than others. It is alleged that Haber's role in the use of chlorine as a deadly weapon drove his wife, Clara Immerwahr, to suicide. After its first use, chlorine was utilized by both sides as a chemical weapon, but it was soon replaced by the more deadly gases phosgene and mustard gas.

For examples, on March 17, 2007, three chlorines filled trucks were bomed in the Anbar province, and it caused to kill 2 and sickening over 350 people. Other chlorine bomb caused more than 30 people dying. The force of the explosions caused to die a lot of people instead of toxic gases. The toxic gases from chlorine dispersed in the atmosphere by the blast. The spread out of chlorine gases resulted widespread panic, which is essential for providing safe drinking water for the population.