ununtrium
ununtrium artificially produced radioactive chemical element; symbol Uut; at. no. 113; mass number of most stable isotope 284; m.p., b.p., sp. gr., and valence unknown. Situated in Group 13 of the periodic table , it is expected to have properties similar to those of thallium and indium .
In a 27-day experiment in 2003, scientists from the Joint Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory in California collaborated in the discovery of ununtrium. They bombarded atoms of americium -243 with ions of calcium -48. Among the products of the bombardment were four atoms of ununpentium (element 115), which in less than one tenth of a second decayed into atoms of ununtrium by emitting an alpha particle. Two isotopes of ununtrium were identified, the longer-lived (Uut-284) having a half-life of about 48 millisecondsc, and the other (Uut-283) a half-life of about 46.6 milliseconds. No name has yet been adopted for element 113, which is therefore called ununtrium, from the Latin roots un for one and tri for three, under a convention for neutral temporary names proposed by the International Union of Pure and Applied Chemistry (IUPAC) in 1980.
See also synthetic elements ; transactinide elements ; transuranium elements .
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Upper limit of the periodic table and synthesis of superheavy elements.
Magazine article from: Progress in Physics; 4/1/2007; ; 700+ words
; ...nuclide. A nuclide is that version of an atom defined by its mass number (A = Z + N), its atomic number (Z) and a power condition of...the last element from the table IUPAC [11] at No. 114, with mass number 289, while scientists suspect nucleus No. 114-298. Such isotopes...
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Table for two.(Physical/Chemistry)
Magazine article from: Science World; 4/26/2004; ; 228 words
; ...nuclear chemist at Lawrence Livermore National Laboratory in California. Moody helped make two new elements, for now called ununtrium and ununpentium. The new elements are superheavy (elements with an atomic number greater than 112) and don't occur naturally...
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Liberal establishment on Tory Row. (Commonwealth Day School controversy)
Magazine article from: National Review; 12/31/1989; ; 700+ words
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The elementiad.(KICKSHAWS)(Poem)
Magazine article from: Word Ways; 8/1/2008; 700+ words
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That familiar feeling: fundraising goes national by going regional.
Magazine article from: The Non-profit Times; 9/15/2008; ; 700+ words
; ...see no reason to change. Yet the idea of customizing mailers from the national headquarters to local tastes has not drawn a mass number of converts. It's wonderful to have all this technology at your disposal and be able to slice and dice everything, said Christopher...
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Selecting casting technology: permanent mold's perspective.(aluminum wheels)
Magazine article from: Modern Casting; 2/1/2003; ; 700+ words
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Many moons: which planet has the most?
Magazine article from: Highlights for Children; 7/1/2004; ; 691 words
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Measurement of the coherent neutron scattering length of [.sup.3]He.
Magazine article from: Journal of Research of the National Institute of Standards and Technology; 5/1/2005; ; 700+ words
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Magazine article from: Chief Executive (U.S.); 2/1/2000; ; 700+ words
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Periodic Table of the Elements: Ununtrium
Book article from: The Columbia Encyclopedia, Sixth Edition
Periodic Table of the Elements: Ununtrium Atomic Number: 113 Atomic Symbol: Uut Ununtrium Atomic Weight: (284) Electron Configuration: 2 · 8 · 18 32 · 32 18 · 6
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element 113
Book article from: The Columbia Encyclopedia, Sixth Edition
see ununtrium .
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Uut
Book article from: The Columbia Encyclopedia, Sixth Edition
symbol for the element ununtrium .
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ununpentium
Book article from: The Columbia Encyclopedia, Sixth Edition
...ununpentium-287 and three atoms of ununpentium-288, each of which in less than one tenth of a second decayed into atoms of ununtrium by emitting an alpha particle. No name has yet been adopted for element 115, which is therefore called ununpentium, from the...
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transuranium elements
Book article from: The Columbia Encyclopedia, Sixth Edition
...114), and working jointly with the Lawrence Livermore National Laboratory (at Livermore, Calif.) claims to have produced ununtrium (at. no. 113) and ununpentium (at. no. 115). The Berkeley team claimed to have produced ununhexium (at. no. 116) and ununoctium...
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