Ununtrium



113 ununquadium
Tl
↑
Uut
↓
(Uht)
General
Number ununtrium, Uut, 113
poor metals
Block 13, p
Appearance unknown, probably silvery
white or metallic gray
Standard atomic weight (293)  g·mol−1
thallium)
shell 2, 8, 18, 32, 32, 18, 3
Phase presumably a solid
CAS registry number 54084-70-7
Selected isotopes
Main article: Isotopes of ununtrium
iso NA half-life DM DE (MeV) DP
284Uut syn 0.48 s
References

Ununtrium (sodium.

Contents

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).

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]

See also

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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