• Latin name:
  Chromium
• English name:
  Chromium
• Year discovered:
  1794
• Discovered by:
  Louis-Nicolas Vauquelin
• Country of Discovery:
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• Cost per 100 grams:
  12.7 USD
• CAS Number:
  CAS7440-47-3
• Electron shell:
  K2-L8-M13-N1-O0-P0-Q0-R0

Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point.

• Atomic number:
  24
• Atomic weight (Relative atomic mass):
  51.9961302818614 (g/mol)
• Density:
  7.15 (g/cm³)
• Melting point:
  1907.0°C = 3464.60°F = 2180.15K
• Boiling point:
  2482.0°C = 4499.60°F = 2755.15K
• Valence electrons:
  2, 3, 6
• Period:
  4
• Group:
  
• Block:
  d - block
• Emission spectrum:
  

• Phase:
  Solid

  
• 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:
  [Ar] 3d5 4s1 = 1s2 2s2 2p6 3s2 3p6 3d5 4s1
Oxidation states:

• 0
• -
• -
• -
• -
• -
• -
• +2
• +3
• +4
• +5
• +6
• -
• -
• -
• Ion charge:
  Cr^{2+, 3+}
• The ionization potential of an atom:
  6.767 (eV)
• Atomic radius:
  166 (pm)
• Covalent radius:
  130 (pm)
• Van der Waals radius:
  189 (pm)

• Electrical conductivity:
  8000000.0 (S/m)
• Electrical type:
  Conductor
• Magnetic type:
  Antiferromagnetism
• Volume magnetic susceptibility:
  3.177 ⋅ 10^-4
• Mass magnetic susceptibility:
  4.45 ⋅ 10^-9
• Molar magnetic susceptibility:
  2.314 ⋅ 10^-9 (m³/mol)
• Resistivity:
  1.25 ⋅ 10^-7 (Ω · m)
• Superconducting point:
  ----

• Debye temperature:
  186.85°C = 368.33°F = 460K

• Colour:
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• CAS Number:
  CAS7440-47-3
• 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:
  1.66
• Valence electrons:
  2, 3, 6
• Electron affinity:
  65.21 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 "Chromium" at the rate of
  0.0015%
• Sun contains "Chromium" at the rate of
  0.002%
• Oceans contain "Chromium" at the rate of
  6 ⋅ 10^-6%
• Human body contains "Chromium" at the rate of
  1.997548474 ⋅ 10^-5%
• The Earth's crust consists of "Chromium" at the rate of
  0.0102%
• Meteorites consist of "Chromium" at the rate of
  0.3%