• Latin name:
  Tantalum
• English name:
  Tantalum
• Year discovered:
  1802
• Discovered by:
  Anders Gustaf Ekeberg
• Country of Discovery:
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• Cost per 100 grams:
  95 USD
• CAS Number:
  CAS7440-25-7
• Electron shell:
  K2-L8-M18-N32-O11-P2-Q0-R0

Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, an antihero from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.

• Atomic number:
  73
• Atomic weight (Relative atomic mass):
  180.947878335825 (g/mol)
• Density:
  16.69 (g/cm³)
• Melting point:
  3017.0°C = 5462.60°F = 3290.15K
• Boiling point:
  5458.0°C = 9856.40°F = 5731.15K
• Valence electrons:
  3, 4, 5
• 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 5d3 6s2 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d3 6s2
Oxidation states:

• -
• -
• -
• -
• -
• -
• -
• +2
• +3
• +4
• +5
• -
• -
• -
• -
• Ion charge:
  Ta⁵⁺
• The ionization potential of an atom:
  7.89 (eV)
• Atomic radius:
  200 (pm)
• Covalent radius:
  158 (pm)
• Van der Waals radius:
  217 (pm)

• Electrical conductivity:
  7633587.78625954 (S/m)
• Electrical type:
  Conductor
• Magnetic type:
  ----
• Volume magnetic susceptibility:
  1.782 ⋅ 10^-4
• Mass magnetic susceptibility:
  1.07 ⋅ 10^-8
• Molar magnetic susceptibility:
  1.936 ⋅ 10^-9 (m³/mol)
• Resistivity:
  1.31 ⋅ 10^-7 (Ω · m)
• Superconducting point:
  -268.68°C = -451.62°F = 4.47K

• Debye temperature:
  -48.15°C = -54.67°F = 225K

• Colour:
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• CAS Number:
  CAS7440-25-7
• 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:
  1.5
• Valence electrons:
  3, 4, 5
• Electron affinity:
  31.0 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 "Tantalum" at the rate of
  ----
• Sun contains "Tantalum" at the rate of
  ----
• Oceans contain "Tantalum" at the rate of
  2.0 ⋅ 10^-8%
• Human body contains "Tantalum" at the rate of
  2.8536407 ⋅ 10^-7%
• The Earth's crust consists of "Tantalum" at the rate of
  2.0 ⋅ 10^-4%
• Meteorites consist of "Tantalum" at the rate of
  2.0 ⋅ 10^-6%