Ununtrium

113 ununbium ← ununtrium → ununquadium
Tl
↑
Uut
↓
(Uht)
Periodic Table - Extended Periodic Table
General
Name, Symbol, Number ununtrium, Uut, 113
Chemical series presumably poor metals
Group, Period, Block 13, 7, p
Appearance unknown, probably silvery
white or metallic gray
Atomic mass (293) g/mol
Electron configuration perhaps [Rn] 5f14 6d10 7s2 7p1
(guess based on thallium)
Electrons per shell 2, 8, 18, 32, 32, 18, 3
Phase presumably a solid
CAS registry number 54084-70-7
References

Ununtrium (IPA: /ˌjuːˈnʌntriəm/), or eka-thallium, is the temporary name of a synthetic element in the periodic table that has the temporary symbol Uut and has the atomic number 113. It comes from the alpha decay (release of a helium nucleus) of ununpentium. Following periodic trends it is expected to be a soft, silvery highly reactive metal, rather like sodium.

Contents
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History

On February 1, 2004, the discovery of ununtrium and ununpentium were reported by a team composed of Russian scientists at Dubna (Joint Institute for Nuclear Research), and American scientists at the Lawrence Livermore National Laboratory.

On September 28, 2004, a team of Japanese scientists at RIKEN declared that they succeeded in synthesizing the element.[1][2]

In May 2006, at the Joint Institute for Nuclear Research, the synthesis of this element was confirmed by another method (the chemical identifying on final products of decay of element).

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Name

Ununtrium is a temporary IUPAC systematic element name. Scientists from Japan proposed for the element the name japonium (symbol Jp) or rikenium (Rk) after RIKEN.[3]

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See also

  • Isotopes of ununtrium
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References

  1. ↑ Morita et al, Experiment on the Synthesis of Element 113 in the Reaction 209Bi(70Zn, n)278113, J. Phys. Soc. Jpn., Vol. 73, No.10. Also press release in Japanese
  2. ↑ [1]
  3. ↑ [2]
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External links

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