Ununhexium is the temporary name of a synthetic superheavy element with the temporary symbol Uuh and atomic number 116. As of December 1, 2011 (2011 -12-01), the name livermorium is in the IUPAC name approval process.
It is placed as the heaviest member of group 16 (VIA) although a sufficiently stable isotope is not known at this time to allow chemical experiments to confirm its position as a heavier homologue to polonium.
It was first detected i...
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Ununhexium is the temporary name of a synthetic superheavy element with the temporary symbol Uuh and atomic number 116. As of December 1, 2011 (2011 -12-01), the name livermorium is in the IUPAC name approval process.
It is placed as the heaviest member of group 16 (VIA) although a sufficiently stable isotope is not known at this time to allow chemical experiments to confirm its position as a heavier homologue to polonium.
It was first detected in 2000 and since the discovery about 35 atoms of ununhexium have been produced, either directly or as a decay product of ununoctium, and are associated with decays from the four neighbouring isotopes with masses 290–293. The most stable isotope to date is ununhexium-293 with a half-life of ~60 ms.
On July 19, 2000, scientists at Dubna (JINR) detected a single decay from an atom of ununhexium following the irradiation of a Cm-248 target with Ca-48 ions. The results were published in December, 2000. This 10.54 MeV alpha-emitting activity was...
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