• Latin name:
  Сhlorum
• English name:
  Chlorine
• Year discovered:
  1774
• Discovered by:
  Carl Wilhelm Scheele
• Country of Discovery:
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• Cost per 100 grams:
  1.8 USD
• CAS Number:
  CAS7782-50-5
• Electron shell:
  K2-L8-M7-N0-O0-P0-Q0-R0

Chlorine is a chemical element with symbol Cl and atomic number 17. It also has a relative atomic mass of 35.5. Chlorine is in the halogen group (17) and is the second lightest halogen following fluorine.

• Atomic number:
  17
• Atomic weight (Relative atomic mass):
  35.4521387667802 (g/mol)
• Density:
  0.00321 (g/cm³)
• Melting point:
  -101.5°C = -150.70°F = 171.65K
• Boiling point:
  -34.04°C = -29.27°F = 239.11K
• Valence electrons:
  1, 2, 3, 4, 5, 7
• Period:
  3
• Group:
  VIIA
• Block:
  p - block
• Emission spectrum:
  

• Phase:
  Gas

  
• Fusion heat:
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• Specific heat:
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• Thermal expansion:
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• Vaporization heat:
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• Electron configuration:
  [Ne] 3s2 3p5 = 1s2 2s2 2p6 3s2 3p5
Oxidation states:

• -
• -1
• -
• -
• -
• -
• -
• -
• +3
• +4
• +5
• -
• +7
• -
• -
• Ion charge:
  Cl^1-
• The ionization potential of an atom:
  12.968 (eV)
• Atomic radius:
  79 (pm)
• Covalent radius:
  100 (pm)
• Van der Waals radius:
  175 (pm)

• Electrical conductivity:
  0.1 (S/m)
• Electrical type:
  Dielectric
• Magnetic type:
  Diamagnetism
• Volume magnetic susceptibility:
  -2.31 ⋅ 10^-8
• Mass magnetic susceptibility:
  -7.2 ⋅ 10^-9
• Molar magnetic susceptibility:
  -5.11 ⋅ 10^-10 (m³/mol)
• Resistivity:
  10.0 (Ω · m)
• Superconducting point:
  ----

• Debye temperature:
  ----

• Colour:
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• CAS Number:
  CAS7782-50-5
• CID Number:
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• RTEC Number:
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• Brinell hardness:
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• Mohs hardness:
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• Vickers hardness:
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• Bulk modulus:
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• Young's modulus:
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• Liquid density:
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• Molar volume:
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• Poisson's ratio:
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• Shear modulus:
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• Speed of sound transmission:
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• Refractive index:
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• Thermal conductivity:
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• Electronegativity:
  3.16
• Valence electrons:
  1, 2, 3, 4, 5, 7
• Electron affinity:
  348.575 kJ/mole

• Radioactive:
  No
• Half life:
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• Lifetime:
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• Neutron cross section, barn:
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• Universe contains "Chlorine" at the rate of
  0.0001%
• Sun contains "Chlorine" at the rate of
  0.0008%
• Oceans contain "Chlorine" at the rate of
  2.0%
• Human body contains "Chlorine" at the rate of
  0.13554793215988%
• The Earth's crust consists of "Chlorine" at the rate of
  0.0145%
• Meteorites consist of "Chlorine" at the rate of
  0.037%