• Latin name:
  Unbiunium
• English name:
  Unbiunium
• Year discovered:
  ≈2010
• Discovered by:
  ----
• Country of Discovery:
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• Cost per 100 grams:
  ----
• CAS Number:
  CAS54576-73-7
• Electron shell:
  K2-L8-M18-N32-O34-P18-Q8-R2

Unbiunium, also known as eka-actinium or more generally as element 121, is the hypothetical chemical element with the symbol Ubu and atomic number 121. Unbiunium and Ubu are respectively the temporary IUPAC name and symbol, which are used until the element is discovered, confirmed and a permanent name is decided upon. It should be the first of the superactinides, and the third element of the eighth period: by analogy with lanthanum and actinium, it could be considered the fifth member of Group 3 and the first member of the fifth row of transition metals, and would be part of the g-block elements: it would be the first element in the classification to have an electron in a g-underlayer in the ground state, at least by application of Klechkowski's rule.

• Atomic number:
  121
• Atomic weight (Relative atomic mass):
  320 (g/mol)
• Density:
  ----
• Melting point:
  ----
• Boiling point:
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• Valence electrons:
  ----
• Period:
  8
• Group:
  
• Block:
  g - block
• Emission spectrum:
  ----

• Phase:
  ----
• 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] 5f14 6d10 7s2 8s2 9s1 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6 8s2 9s1
Oxidation states:

• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• -
• Ion charge:
  ----
• The ionization potential of an atom:
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• Atomic radius:
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• Covalent radius:
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• Van der Waals radius:
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• Electrical conductivity:
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• Electrical type:
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• Magnetic type:
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• Volume magnetic susceptibility:
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• Mass magnetic susceptibility:
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• Molar magnetic susceptibility:
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• Resistivity:
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• Superconducting point:
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• Crystal structure:
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• Grid parameters:
  ----
• Attitude:
  ----

• Debye temperature:
  ----

• Colour:
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• CAS Number:
  CAS54576-73-7
• 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:
  ----
• Valence electrons:
  ----
• Electron affinity:
  ----

• Radioactive:
  Yes
• Half life:
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• Lifetime:
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• Neutron cross section, barn:
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• Universe contains "Unbiunium" at the rate of
  ----
• Sun contains "Unbiunium" at the rate of
  ----
• Oceans contain "Unbiunium" at the rate of
  ----
• Human body contains "Unbiunium" at the rate of
  ----
• The Earth's crust consists of "Unbiunium" at the rate of
  ----
• Meteorites consist of "Unbiunium" at the rate of
  ----