Around 1.9% of the ocean's mass is composed of chlorine atoms.Chlorine gas was used by the Germans in WWI to poison the Allied soldiers.Chlorine found in nature is a mixture of these two isotopes. He also gave the element its name.Ĭhlorine gets its name from the Greek word "chloros", which means "yellow-green."Ĭhlorine has two stable isotopes: Cl-35 and Cl-37. It was English chemist Sir Humphry Davy who proved that it was a unique element in 1810. However, for many years scientists thought that the gas contained oxygen. Our body's use it to help us digest food, move our muscles, and fight off germs.Ĭhlorine gas was first produced by Swedish chemist Carl Wilhelm Scheele in 1774. Because it kills germs, chlorine is also used in disinfectants and is the basis for most bleaches.Ĭhlorine is needed for the survival of animal life in the form of table salt (NaCl). It is also used in drinking water to kill bacteria so we don't get sick when we drink it. Chlorine is used in pools to keep it clean and safe by killing bacteria, germs, and algae. You have probably heard people mention that chlorine is used in pools. It is used in making a variety of products including insecticides, pharmaceuticals, cleaning products, textiles, and plastics. Tens of billions of pounds of chlorine are produced each year in the United States alone for use in industrial applications. In the Earth's crust, the most common minerals containing chlorine include halite (NaCl), carnallite, and sylvite (KCl).Ĭhlorine is one of the most important chemicals used by industry. In the ocean, chlorine is found as part of the compound sodium chloride (NaCl), also known as table salt. Most common chlorine compounds are called chlorides, but it also forms compounds with oxygen called chlorine oxides.Ĭhlorine can be found in abundance in both the Earth's crust and in ocean water. Chlorine will react with all the other elements except the noble gases.
It will dissolve in water, but will also react with water as it dissolves.
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High concentrations of chlorine gas can be fatal.Ĭhlorine is very reactive and, as a result, is not found in its free form in nature, but only in compounds with other elements. Chlorine gas is greenish yellow, has a very strong odor (it smells like bleach), and is poisonous to humans.
This means that two chlorine atoms join together to form Cl 2. Under standard conditions chlorine is a gas that forms diatomic molecules. It is about the twentieth most abundant element in the Earth's crust. It has 17 electrons and 17 protons with 7 valence electrons in the outer shell.
It is classified as a member of the halogen group. Discovered by: Carl Wilhelm Scheele produced the gas in 1774, but it was Sir Humphry Davy who first called it an element and named it chlorine in 1810Ĭhlorine is the second element in the seventeenth column of the periodic table.
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