• Latin name:
  Fluorum
• English name:
  Fluorine
• Year discovered:
  1810
• Discovered by:
  Ferdinand Frederic Henri Moissan
• Country of Discovery:
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• Cost per 100 grams:
  45 USD
• CAS Number:
  CAS7782-41-4
• Electron shell:
  K2-L7-M0-N0-O0-P0-Q0-R0

Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive:almost all other elements, including some noble gases, form compounds with fluorine.

• Atomic number:
  9
• Atomic weight (Relative atomic mass):
  18.9984031620854 (g/mol)
• Density:
  0.001696 (g/cm³)
• Melting point:
  -219.67°C = -363.41°F = 53.48K
• Boiling point:
  -188.11°C = -306.60°F = 85.04K
• Valence electrons:
  1
• Period:
  2
• 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:
  1s2 2s2 2p5
Oxidation states:

• -
• -1
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• Ion charge:
  F^1-
• The ionization potential of an atom:
  17.423 (eV)
• Atomic radius:
  42 (pm)
• Covalent radius:
  60 (pm)
• Van der Waals radius:
  135 (pm)

• Electrical conductivity:
  ----
• Electrical type:
  ----
• Magnetic type:
  ----
• Volume magnetic susceptibility:
  ----
• Mass magnetic susceptibility:
  ----
• Molar magnetic susceptibility:
  ----
• Resistivity:
  ----
• Superconducting point:
  ----

• Debye temperature:
  ----

• Colour:
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• CAS Number:
  CAS7782-41-4
• 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:
  3.98
• Valence electrons:
  1
• Electron affinity:
  328.1649 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 "Fluorine" at the rate of
  4 ⋅ 10^-5%
• Sun contains "Fluorine" at the rate of
  5 ⋅ 10^-5%
• Oceans contain "Fluorine" at the rate of
  1.3 ⋅ 10^-4%
• Human body contains "Fluorine" at the rate of
  0.00370973288017%
• The Earth's crust consists of "Fluorine" at the rate of
  0.0585%
• Meteorites consist of "Fluorine" at the rate of
  0.0087%