By: Jordyn Bakeberg
Chlorine- was discovered in 1774 by Carl Wilhelm Scheele, who mistakenly thought it contained oxygen. Chlorine was given its name in 1810 by Humphry Davy, who insisted that it was in fact an element
- 1. Symbol- Cl Atomic Number- 17 Atomic Mass- 35.453
- 2 A. Chlorine has a melting point of -100.98°C
- B. Boiling point of -34.6°C
- C. Density of 3.214 g/l
- D. Abundance of Chlorine in the Earth’s crust- 0.017%
1. In nature it is only found combined with other elements chiefly sodium in the form of common salt (NaCl), but also in carnallite, and sylvite. Chlorides make up much of the salt dissolved in the earth's oceans: about 1.9 % of the mass of seawater is chloride ions.
* Chlorine is also used widely in the manufacture of many products and items directly or indirectly, i.e. in paper product production, antiseptic, dyestuffs, food, insecticides, paints, petroleum products, plastics, medicines, textiles, solvents, and many other consumer products
- It is used to kill bacteria and other microbes from drinking water supplies.
- Chlorine is involved in beaching wood pulp for paper making bleach is also used industrially to remove ink from recycle paper.
- Manufacture of chlorates, chloroform, carbon tetrachloride.
Interesting Facts about Chlorine
1. The first chain reaction discovered was not a nuclear reaction; it was a chemical chain reaction. It was discovered in 1913 by Max Bodenstein, who saw a mixture of chlorine and hydrogen gases explode when triggered by light. The chain reaction mechanism was fully explained in 1918 by Walther Nernst.
2. Earth’s oceans contain a large amount of chlorine. If this chlorine were released as a gas, its weight would be 5x greater than Earth’s total current atmosphere. (Our oceans contain about 2.6 x 1016metric tons of chlorine, mostly as sodium chloride.)
3. Chlorine is not only abundant in our oceans; it is the sixth most abundant element in Earth’s crust.
4. Exposure to small amounts of chlorine, even for a short time, can be deadly. Fatalities are expected at 1 part in a thousand chlorine in air (or sometimes at even lower concentrations). (5)
5. Chlorine is heavier than air. When released, it forms a poisonous blanket that drifts along with the wind. Chlorine was used as a chemical weapon in World War I, first in 1915 by the German army and then by the Western Allies. It was not as ‘effective’ as had been hoped, because chlorine is easily detected by its strong smell. It is also water soluble, and so soldiers could protect themselves from the worst of its effects by breathing through damp cloths.