• Latin name:
  Mendelevium
• English name:
  Mendelevium
• Year discovered:
  1955
• Discovered by:
  Glenn Theodore Seaborg
• Country of Discovery:
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• Cost per 100 grams:
  ----
• CAS Number:
  CAS7440-11-1
• Electron shell:
  K2-L8-M18-N32-O31-P8-Q2-R0

Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element.

• Atomic number:
  101
• Atomic weight (Relative atomic mass):
  258.788547718991 (g/mol)
• Density:
  ~10.3 (g/cm³)
• Melting point:
  827.0°C = 1520.60°F = 1100.15K
• Boiling point:
  ----
• Valence electrons:
  ----
• Period:
  7
• Group:
  
• Block:
  f - 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:
  [Rn] 5f13 7s2 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f13 6s2 6p6 7s2
Oxidation states:

• -
• -
• -
• -
• -
• -
• -
• -
• +3
• -
• -
• -
• -
• -
• -
• Ion charge:
  Md^{2+, 3+}
• The ionization potential of an atom:
  6.58 (eV)
• Atomic radius:
  ----
• Covalent radius:
  173 (pm)
• Van der Waals radius:
  246 (pm)

• Electrical conductivity:
  ----
• Electrical type:
  ----
• Magnetic type:
  ----
• Volume magnetic susceptibility:
  ----
• Mass magnetic susceptibility:
  ----
• Molar magnetic susceptibility:
  ----
• Resistivity:
  ----
• Superconducting point:
  ----

• Debye temperature:
  ----

• Colour:
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• CAS Number:
  CAS7440-11-1
• 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:
  1.3
• Valence electrons:
  ----
• Electron affinity:
  93.91 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 "Mendelevium" at the rate of
  ----
• Sun contains "Mendelevium" at the rate of
  ----
• Oceans contain "Mendelevium" at the rate of
  ----
• Human body contains "Mendelevium" at the rate of
  ----
• The Earth's crust consists of "Mendelevium" at the rate of
  ----
• Meteorites consist of "Mendelevium" at the rate of
  ----