• Latin name:
  Technetium
• English name:
  Technetium
• Year discovered:
  1937
• Discovered by:
  Emilio Gino Segrè, Carlo Perrier
• Country of Discovery:
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• Cost per 100 grams:
  10000+ USD
• CAS Number:
  CAS7440-26-8
• Electron shell:
  K2-L8-M18-N13-O2-P0-Q0-R0

Technetium (tɛkˈniːʃiəm) is a chemical element with symbol Tc and atomic number 43. It is the element with the lowest atomic number in the periodic table that has no stable isotopes:every form of it is radioactive. Nearly all technetium is produced synthetically, and only minute amounts are found in nature.

• Atomic number:
  43
• Atomic weight (Relative atomic mass):
  97.4429222893571 (g/mol)
• Density:
  11.5 (g/cm³)
• Melting point:
  2157.0°C = 3914.60°F = 2430.15K
• Boiling point:
  4265.0°C = 7709.00°F = 4538.15K
• Valence electrons:
  6
• Period:
  5
• 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:
  [Kr] 4d5 5s2 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d5 5s2
Oxidation states:

• 0
• -1
• -
• -
• -
• -
• +1
• -
• +3
• +4
• +5
• +6
• +7
• -
• -
• Ion charge:
  Tc⁷⁺
• The ionization potential of an atom:
  7.28 (eV)
• Atomic radius:
  183 (pm)
• Covalent radius:
  138 (pm)
• Van der Waals radius:
  209 (pm)

• Electrical conductivity:
  5000000.0 (S/m)
• Electrical type:
  Conductor
• Magnetic type:
  ----
• Volume magnetic susceptibility:
  3.933 ⋅ 10^-4
• Mass magnetic susceptibility:
  3.42 ⋅ 10^-8
• Molar magnetic susceptibility:
  3.352 ⋅ 10^-9 (m³/mol)
• Resistivity:
  2 ⋅ 10^-7 (Ω · m)
• Superconducting point:
  -265.35°C = -445.63°F = 7.8K

• Debye temperature:
  179.85°C = 355.73°F = 453K

• Colour:
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• CAS Number:
  CAS7440-26-8
• 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:
  1.9
• Valence electrons:
  6
• Electron affinity:
  53.0 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 "Technetium" at the rate of
  ----
• Sun contains "Technetium" at the rate of
  ----
• Oceans contain "Technetium" at the rate of
  ----
• Human body contains "Technetium" at the rate of
  ----
• The Earth's crust consists of "Technetium" at the rate of
  ----
• Meteorites consist of "Technetium" at the rate of
  ----