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Ununpentium [Uup] locate me
CAS-ID: 54085-64-2
An: 115 N: 172
Am: [288] g/mol
Group No: 15
Group Name: Pnictogen
Block: p-block  Period: 7
State: presumably a solid at 298 K
Colour: unknown, but probably metallic and silvery white or grey in appearance Classification: Metallic
Boiling Point: unknown
Melting Point: unknown
Density: unknown
Availability: This item is purely synthetic and is not available commercially.
Discovery Information
Who: Dubna (Joint Institute for Nuclear Research)
When: 2004
Where: Russia
Name Origin
From the latin for "one one five".
 "Ununpentium" in different languages.
Sources
Synthetically produced element.
Uses
None.
History
Experiments resulting in the formation of element 115 were reported in February 2004 following experiments carried out between 14 July - 10 August 2003 involving scientists at Dubna (Joint Institute for Nuclear Research at the U400 cyclotron with the Dubna gas-filled recoil separator, DGFRS) in Russia in a collaboration also involving scientists at the Lawrence Livermore National Laboratory, USA. Only four nuclei were identified and the claim has not yet been ratified, but the results are now published in a reputable peer-reviewed journal.
Currently, the identification of element 115 is yet to be confirmed by IUPAC, but the experiments leading to element 115 are now published in a prestigious peer reviewed journal. As only about four atoms of element 115 have ever been made (through nuclear reactions involving fusing calcium nuclei with americium nuclei) isolation of an observable quantity has never been achieved, and may well never be.