Ununtrium

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113 ununbium ← ununtrium → ununquadium Tl ↑ Uut ↓ (Uht) Image:Uut-TableImage.png 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
Standard atomic weight	(293)  g·mol−1
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
Selected isotopes
Main article: Isotopes of ununtrium iso NA half-life DM DE (MeV) DP 284Uut syn 0.48 s
References

Ununtrium (pronounced /juːˈnʌntriəm/), 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 1 History 2 Name 3 See also 4 References 5 External links

[edit] 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).

[edit] 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]

[edit] See also

• Isotopes of ununtrium
• Island of stability

[edit] 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]

[edit] External links

• WebElements.com - Uut
• Uut and Uup Add Their Atomic Mass to Periodic Table
• Apsidium - Ununtrium
• Discovery of Elements 113 and 115
• Superheavy elementsar:أنون تريوم

ast:Ununtriu bn:ইউনুনট্রিয়াম bs:Ununtrijum ca:Ununtri cs:Ununtrium co:Ununtriu de:Ununtrium et:Ununtrium es:Ununtrio eo:Ununtrio fr:Ununtrium fur:Ununtrium gl:Ununtrio (elemento) ko:우눈트륨 hr:Ununtrij it:Ununtrio he:אונונטריום ku:Element 113 la:Ununtrium lb:Ununtrium hu:Ununtrium nl:Ununtritium ja:ウンウントリウム no:Ununtrium nn:Ununtrium nds:Ununtrium pl:Ununtrium pt:Ununtrio ru:Унунтрий simple:Ununtrium sk:Ununtrium sr:Унунтријум sh:Ununtrijum fi:Ununtrium sv:Ununtrium th:อูนอูนเทรียม uk:Унунтрій zh:Uut