Ununhexium (pronounced /uːnuːnˈhɛksiəm/ ( listen) oon-oon-HEKS-ee-əm) is the temporary name of a synthetic superheavy element with the temporary symbol Uuh and atomic number 116.
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 the heavier homologue to polonium.
It was first detected in 2000 and since the discovery about ...
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Ununhexium (pronounced /uːnuːnˈhɛksiəm/ ( listen) oon-oon-HEKS-ee-əm) is the temporary name of a synthetic superheavy element with the temporary symbol Uuh and atomic number 116.
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 the heavier homologue to polonium.
It was first detected in 2000 and since the discovery about 30 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 Uuh-293 with a half-life of ~60 ms.
On July 19, 2000, scientists at Dubna (FLNR) 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 originally assigned to Uuh due to the...
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