Chlorine - Element Properties and Periodic Table Information

Chlorine - An element from the Periodic Table based on the IOUPAC 1985 standard

Chemical Elements

Periodic Table

Definition of the Chlorine Element
A highly irritating, greenish-yellow gaseous halogen, capable of combining with nearly all other elements, produced principally by electrolysis of sodium chloride and used widely to purify water, as a disinfectant and bleaching agent, and in the manufacture of many important compounds including chloroform and carbon tetrachloride.

Origin / Meaning of the name Chlorine
The name originates from the Greek word 'khloros' meaning green referring to the color of the gas.

Classification of the Chlorine Element
Chlorine is classified as an element in the 'Halogens' section which can be located in group 7 of the Periodic Table. The term "halogen" means "salt-former" and compounds containing halogens are called "salts". The halogens exist, at room temperature, in all three states of matter - Gases such as Fluorine & Chlorine, Solids such as Iodine and Astatine and Liquid as in Bromine.

Facts about the Discovery and History of the Chlorine Element
Chlorine was discovered by Carl Wilhelm Scheele  in 1774. Chlorine was given its name in 1810 by Humphrey Davy.

Occurrence the Chlorine Element
Obtained from Earth's oceans salt
Found only as the chloride ion
1.9% of the mass of seawater is chloride ions

Associated Uses of Chlorine
Bleaches
Mustard gas
Water purification
Production of chlorates
Paper production
Antiseptic
Insecticides
Paint
Plastics
Medicines
Hypochlorous acid
Chlorine dioxide
 

The Properties of the Chlorine Element
Name of Element : Chlorine
Symbol of Element : Cl
Atomic Number of Chlorine : 17
Atomic Mass: 35.4527 amu
Melting Point: -100.98 °C - 172.17 °K
Boiling Point: -34.6 °C - 238.55 °K
Number of Protons/Electrons in Chlorine : 17
Number of Neutrons in Chlorine : 18
Crystal Structure: Orthorhombic
Density @ 293 K: 3.214 g/cm3
Color of Chlorine : greenish-yellow

Chlorine and the Periodic Table
Check out Chlorine on the Periodic Table which arranges each chemical element according to its atomic number, as based on the periodic law, so that chemical elements with similar properties are in the same column. Our Periodic Table is simple to use - just click on the symbol for Chlorine for additional information and for an instant comparison of the Atomic Weight, Melting Point, Boiling Point and Mass - G/cc with any other element. An invaluable source of facts and information as a Chemistry reference guide.

Chlorine - IUPAC and the Modern Standardised Periodic Table
The Standardised Periodic Table in use today was agreed by the International Union of Pure Applied Chemistry, IUPAC, in 1985 and now recognises more periods and elements than Dimitri  Mendeleev knew in his day but still all fitting into his concept of  the "Periodic Table" in which Chlorine is just one element that can be found.
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The Element Chlorine

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