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LC control no.sh2012003544
Topical headingNihonium
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See alsoSuperheavy elements
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Found inWork cat.: Aldridge, S. Ununquadium, ununtrium, ununpentium, ununhexium, ununseptium, and ununoctium, 2012.
Wikipedia, Aug. 31, 2012 (Ununtrium is the temporary name of a synthetic element with the temporary symbol Uut and atomic number 113. It is placed as the heaviest member of the group 13 (IIIA) elements although a sufficiently stable isotope is not known at this time that would allow chemical experiments to confirm its position as a heavier homologue to thallium. It was first detected in 2003 in the decay of ununpentium and was synthesized directly in 2004. Only fourteen atoms of ununtrium have been observed to date. The longest-lived isotope known is ²⁸⁶Uut with a half-life of ~20 s, allowing first chemical experiments to study its chemistry. The element with atomic number 113 is historically known as eka-thallium. Ununtrium (Uut) is a temporary IUPAC systematic element name. Research scientists usually refer to the element simply as element 113 (or E113). Element category: unknown; presumably post-transition metals)
WebElements website, Aug. 31, 2012 (Ununtrium; Uut; currently, the identification of element 113 is yet to be confirmed by IUPAC, but the experiments leading to element 113 are now published in a prestigious peer reviewed journal. As only about four atoms of element 113 has ever been made (through decomposition of element 115 nuclei made in nuclear reactions involving fusing calcium nuclei with americium nuclei) isolation of an observable quantity has never been achieved, and may well never be.) June 20, 2016 (Nihonium; Nh; On 8 June 2016 IUPAC announced the new name nihonium (symbol Nh) for element 113 in place of the temporary systematic name ununtrium (Uut))
The element ununtrium, via It's elemental : the periodic table of elements website, Aug. 31, 2012 (Ununtrium; Uut; Atomic Number: 113; Atomic Weight: 286; Element classification: Metal; Period Number: 7; Group Number: 13; Group Name: none; radioactive and artificially produced; a temporary name that means one-one-three; On February 2, 2004, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory, announced the creation of ununtrium. In experiments performed between July 14, 2003 and August 10, 2003, atoms of americium-243 were bombarded with ions of calcium-48 using a device called a cyclotron. This produced one atom of ununpentium-287 and three atoms of ununpentium-288. All four atoms of ununpentium quickly decayed into ununtrium through alpha decay. Ununtrium's most stable isotope, ununtrium-286, has a half-life of about 28.3 seconds. It decays into roentgenium-282 through alpha decay.)
The element nihonium, via It's elemental : the periodic table of the elements website, June 20, 2016 (Nihonium; Nh; Atomic Number: 113; Atomic Weight: 286)
IUPAC is naming the four new elements nihonium, moscovium, tennessine, and oganesson, 8 June 2016, via International Union of Pure and Applied Chemistry website, viewed June 20, 2016 (Nihonium and symbol Nh, for the element 113; For the element with atomic number 113 the discoverers at RIKEN Nishina Center for Accelerator-Based Science (Japan) proposed the name nihonium and the symbol Nh. Nihon is one of the two ways to say "Japan" in Japanese, and literally mean "the Land of Rising Sun". The name is proposed to make a direct connection to the nation where the element was discovered. Element 113 is the first element to have been discovered in an Asian country)