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Chlorine,  17Cl
Chlorine ampoule.jpg
General properties
Name, seembol chlorine, Cl
Pronunciation /ˈklɔərn/ KLOHR-een
or /ˈklɔərɨn/ KLOHR-ən
Appearance pale yellae-green gas
Chlorine in the periodic cairt
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline yird metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline yird metal)
Aluminium (post-transeetion metal)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline yird metal)
Scandium (transeetion metal)
Titanium (transeetion metal)
Vanadium (transeetion metal)
Chromium (transeetion metal)
Manganese (transeetion metal)
Iron (transeetion metal)
Cobalt (transeetion metal)
Nickel (transeetion metal)
Copper (transeetion metal)
Zinc (transeetion metal)
Gallium (post-transeetion metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline yird metal)
Yttrium (transeetion metal)
Zirconium (transeetion metal)
Niobium (transeetion metal)
Molybdenum (transeetion metal)
Technetium (transeetion metal)
Ruthenium (transeetion metal)
Rhodium (transeetion metal)
Palladium (transeetion metal)
Silver (transeetion metal)
Cadmium (transeetion metal)
Indium (post-transeetion metal)
Tin (post-transeetion metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline yird metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transeetion metal)
Tantalum (transeetion metal)
Tungsten (transeetion metal)
Rhenium (transeetion metal)
Osmium (transeetion metal)
Iridium (transeetion metal)
Platinum (transeetion metal)
Gold (transeetion metal)
Mercury (transeetion metal)
Thallium (post-transeetion metal)
Lead (post-transeetion metal)
Bismuth (post-transeetion metal)
Polonium (post-transeetion metal)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline yird metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transeetion metal)
Dubnium (transeetion metal)
Seaborgium (transeetion metal)
Bohrium (transeetion metal)
Hassium (transeetion metal)
Meitnerium (unkent chemical properties)
Darmstadtium (unkent chemical properties)
Roentgenium (unkent chemical properties)
Copernicium (transeetion metal)
Ununtrium (unkent chemical properties)
Flerovium (post-transeetion metal)
Ununpentium (unkent chemical properties)
Livermorium (unkent chemical properties)
Ununseptium (unkent chemical properties)
Ununoctium (unkent chemical properties)


Atomic nummer 17
Staundart atomic wicht (±) (Ar) 35.45(1)
Element category   diatomic nonmetal
Group, block group 17 (halogens), p-block
Period period 3
Electron configuration [Ne] 3s2 3p5
per shell
2, 8, 7
Pheesical properties
Phase gas
Meltin pynt 171.6 K ​(-101.5 °C, ​-150.7 °F)
Boilin pynt 239.11 K ​(-34.04 °C, ​-29.27 °F)
Density at stp (0 °C an 101.325 kPa) 3.2 g/L
when liquid, at b.p. 1.5625[1] g/cm3
Creetical pynt 416.9 K, 7.991 MPa
Heat o fusion (Cl2) 6.406 kJ/mol
Heat o (Cl2) 20.41 kJ/mol
Molar heat capacity (Cl2)
33.949 J/(mol·K)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 128 139 153 170 197 239
Atomic properties
Oxidation states 7, 6, 5, 4, 3, 2, 1, -1 ​strangly acidic oxide
Electronegativity Pauling scale: 3.16
Covalent radius 102±4 pm
Van der Waals radius 175 pm
Crystal structur orthorhombic
Orthorhombic crystal structure for chlorine
Speed o soond (gas, 0 °C) 206 m/s
Thermal conductivity 8.9×10−3  W/(m·K)
Electrical resistivity > 10  Ω·m (at 20 °C)
Magnetic orderin diamagnetic[2]
CAS Registry Nummer 7782-50-5
Discovery Carl Wilhelm Scheele (1774)
First isolation Carl Wilhelm Scheele (1774)
Recognized as an element bi Humphry Davy (1808)
Maist stable isotopes
Main article: Isotopes o chlorine
iso NA hauf-life DM DE (MeV) DP
35Cl 75.77% 35Cl is stable wi 18 neutrons
36Cl trace 3.01×105 y β 0.709 36Ar
ε - 36S
37Cl 24.23% 37Cl is stable wi 20 neutrons
· references

Chlorine is a chemical element wi seembol Cl an atomic nummer 17. Chlorine is in the halogen group (17) an is the seicont lichtest halogen efter fluorine. The element is a yellae-green gas unner staundart condeetions, whaur it furms diatomic molecules. It haes the heichest electron affinity an the third heichest electronegativity o aw the reactive elements; for this reason, chlorine is a strang oxidizin agent. Free chlorine is rare on Yird, an is uisually a result o direct or indirect oxidation bi oxygen.

References[eedit | eedit soorce]

  1. Chlorine, Gas Encyclopaedia, Air Liquide
  2. Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.