Chlorine

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Chlorine,  17Cl
A gless conteener filled wi chlorine gas
General properties
Appearance fauch yellae-green gas
Staundart atomic wecht (Ar, staundart) [35.44635.457] conventional: 35.45
Chlorine in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
F

Cl

Br
sulfurchlorineargon
Atomic nummer (Z) 17
Group group 17 (halogens)
Period period 3
Element category   diatomic nonmetal
Block p-block
Electron confeeguration [Ne] 3s2 3p5
Electrons per shell
2, 8, 7
Pheesical properties
Phase (at STP) gas
Meltin pynt 171.6 K ​(-101.5 °C, ​-150.7 °F)
Bylin pynt 239.11 K ​(-34.04 °C, ​-29.27 °F)
Density (at STP) 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 vapourisation (Cl2) 20.41 kJ/mol
Molar heat capacity (Cl2)
33.949 J/(mol·K)
Vapour pressur
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
Ionisation energies
Covalent radius 102±4 pm
Van der Waals radius 175 pm
Color lines in a spectral range
Miscellanea
Creestal structurorthorhombic
Orthorhombic creestal structur for chlorine
Speed o soond (gas, 0 °C) 206 m/s
Thermal conductivity 8.9×103  W/(m·K)
Electrical resistivity > 10  Ω·m (at 20 °C)
Magnetic orderin diamagnetic[2]
CAS Nummer 7782-50-5
History
Diskivery Carl Wilhelm Scheele (1774)
First isolation Carl Wilhelm Scheele (1774)
Recognised as an element bi Humphry Davy (1808)
Main isotopes o chlorine
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
35Cl 75.77% stable
36Cl trace 3.01×105 y β 36Ar
ε 36S
37Cl 24.23% stable
| references | in Wikidata

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 o the elements an 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.