• Latin name:
  Platinum
• English name:
  Platinum
• Year discovered:
  1735
• Discovered by:
  Antonio de Ulloa
• Country of Discovery:
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• Cost per 100 grams:
  1750 USD
• CAS Number:
  CAS7440-06-4
• Electron shell:
  K2-L8-M18-N32-O17-P1-Q0-R0

Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, gray-white transition metal. Its name is derived from the Spanish term platina, which is literally translated into "little silver".

• Atomic number:
  78
• Atomic weight (Relative atomic mass):
  195.084429339468 (g/mol)
• Density:
  21.45 (g/cm³)
• Melting point:
  1768.3°C = 3214.94°F = 2041.45K
• Boiling point:
  3825.0°C = 6917.00°F = 4098.15K
• Valence electrons:
  2, 4
• Period:
  6
• 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:
  [Xe] 4f14 5d9 6s1 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d9 6s1
Oxidation states:

• 0
• -1
• -2
• -
• -
• -
• -
• +2
• -
• +4
• -
• +6
• -
• -
• -
• Ion charge:
  Pt^{2+, 4+}
• The ionization potential of an atom:
  9 (eV)
• Atomic radius:
  177 (pm)
• Covalent radius:
  130 (pm)
• Van der Waals radius:
  209 (pm)

• Electrical conductivity:
  9523809.52380952 (S/m)
• Electrical type:
  Conductor
• Magnetic type:
  Paramagnetism
• Volume magnetic susceptibility:
  2.573 ⋅ 10^-4
• Mass magnetic susceptibility:
  1.22 ⋅ 10^-8
• Molar magnetic susceptibility:
  2.38 ⋅ 10^-9 (m³/mol)
• Resistivity:
  1.05 ⋅ 10^-7 (Ω · m)
• Superconducting point:
  ----

• Debye temperature:
  -43.15°C = -45.67°F = 230K

• Colour:
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• CAS Number:
  CAS7440-06-4
• 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:
  2.28
• Valence electrons:
  2, 4
• Electron affinity:
  205.041 kJ/mole

• Radioactive:
  Yes
• Half life:
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• Lifetime:
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• Neutron cross section, barn:
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• Universe contains "Platinum" at the rate of
  ----
• Sun contains "Platinum" at the rate of
  9 ⋅ 10^-5%
• Oceans contain "Platinum" at the rate of
  ----
• Human body contains "Platinum" at the rate of
  ----
• The Earth's crust consists of "Platinum" at the rate of
  5.0 ⋅ 10^-7%
• Meteorites consist of "Platinum" at the rate of
  9.8 ⋅ 10^-5%