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Author: langbot
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English[en]
Tennessine is a synthetic chemical element with the symbol Ts and atomic number 117. It is the second-heaviest known element and the penultimate element of the 7th period of the periodic table. The discovery of tennessine was officially announced in Dubna, Russia, by a Russian–American collaboration in April 2010, which makes it the most recently discovered element as of 2022. One of its daughter isotopes was created directly in 2011, partially confirming the results of the experiment. The experiment itself was repeated successfully by the same collaboration in 2012 and by a joint German–American team in May 2014. In December 2015, the Joint Working Party of the International Union of Pure and Applied Chemistry (IUPAC) and the International Union of Pure and Applied Physics (IUPAP), which evaluates claims of discovery of new elements, recognized the element and assigned the priority to the Russian–American team. In June 2016, the IUPAC published a declaration stating that the discoverers had suggested the name tennessine after Tennessee, United States, a name which was officially adopted in November 2016.[a]
Cornish[kw]
Elven gymyk synthetek yw tenessin, niver 117 yn Vosen Beriodek hag onan a'n elvennow treus-fermiom. Y furvell gymyk yw Ts. Diskudhys veu tenessin yn mis Ebrel 2010 yn Dubna, Russi gans bagas a wodhonydhyon dhyworth Russi ha'n Statys Unys (dhyworth Kaliforni ha Tennessi). Ytho tenessin yw an elven diskudhys moyha a-dhiwedhes, ha'n elven nessa possa wosa oganesson. Yma dew isotop dhe denessin, an unn gans an hanter-bewnans hirra yw tenessin-294, 51 milieylen. An hanow a dheu dhyworth stat y'n Statys Unys, Tennessi. Gwrys veu an atomow tenessin dre danbellenna kosten a verkeliom gans kalciom. An berkeliom a dheuth dhyworth Arbrovji Kenedhlek Oak Ridge, yn Tennessee.