Copernicium
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! style="text-align:right;" | 283Uub
| style="text-align:center;" | syn
| style="text-align:right;" | ~5 min
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Ununbium (IPA: /ˌjuːˈnʌnbiəm/), or eka-mercury, is a temporary IUPAC systematic element name for a chemical element in the periodic table that has the temporary symbol Uub and the atomic number 112. Element 112 is one of the superheavy elements. Following periodic trends, one might expect a liquid metal more volatile than mercury. However, some experimental work so far indicates a gas[1] and theoretical considerations also point to properties more similar to a noble gas than to mercury.[1][2]
History
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Ununbium was first created on February 9, 1996 at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany. This element was created by fusing a zinc atom with a lead atom by accelerating zinc nuclei into a lead target in a heavy ion accelerator.
The element was synthesized in 2000 and 2004 in the Joint Institute for Nuclear Research, Russia.
In May 2006 in the Joint Institute for Nuclear Research the synthesis of this element was confirmed by another method (identified as a final product of an elemental decay series).
References
- ^ a b "Indication for a gaseous element 112" (PDF).
- ^ ""Chemistry of Hassium"" (PDF). Gesellschaft für Schwerionenforschung mbH. 2002. Retrieved 2007-01-31.
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