• Latin name:
  Oxygenium
• English name:
  Oxygen
• Year discovered:
  1771
• Discovered by:
  Michał Sędziwój, Joseph Priestley, Carl Wilhelm Scheele
• Country of Discovery:
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• Cost per 100 grams:
  1.5 USD
• CAS Number:
  CAS7782-44-7
• Electron shell:
  K2-L6-M0-N0-O0-P0-Q0-R0

Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms compounds (notably oxides) with most elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.

• Atomic number:
  8
• Atomic weight (Relative atomic mass):
  15.9994049240801 (g/mol)
• Density:
  0.001429 (g/cm³)
• Melting point:
  -218.79°C = -361.82°F = 54.36K
• Boiling point:
  -182.962°C = -297.33°F = 90.19K
• Valence electrons:
  2
• Period:
  2
• Group:
  VIA
• 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 2p4
Oxidation states:

• 0
• -1
• -2
• -
• -
• -
• +1
• +2
• -
• -
• -
• -
• -
• -
• -
• Ion charge:
  O^2-
• The ionization potential of an atom:
  13.618 (eV)
• Atomic radius:
  48 (pm)
• Covalent radius:
  64 (pm)
• Van der Waals radius:
  152 (pm)

• Electrical conductivity:
  ----
• Electrical type:
  ----
• Magnetic type:
  Paramagnetism
• Volume magnetic susceptibility:
  1.90772 ⋅ 10^-6
• Mass magnetic susceptibility:
  1.335 ⋅ 10^-9
• Molar magnetic susceptibility:
  4.27184 ⋅ 10^-8 (m³/mol)
• Resistivity:
  ----
• Superconducting point:
  ----

• Debye temperature:
  -118.15°C = -180.67°F = 155K

• Colour:
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• CAS Number:
  CAS7782-44-7
• 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:
  3.44
• Valence electrons:
  2
• Electron affinity:
  140.976 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 "Oxygen" at the rate of
  1%
• Sun contains "Oxygen" at the rate of
  0.97%
• Oceans contain "Oxygen" at the rate of
  86.0%
• Human body contains "Oxygen" at the rate of
  61.3532745565778%
• The Earth's crust consists of "Oxygen" at the rate of
  46.1%
• Meteorites consist of "Oxygen" at the rate of
  40.0%