Ununpentium

=Ununpentium:=


 * Symbol: Uup
 * Atomic Number: 115
 * Atomic Weight: [ 288 ]
 * Standard state: presumably a solid at 298 K
 * Group: 15
 * Group name: Pnictogen
 * Period: 7
 * Color: unknown, but probably metallic and silvery white or grey in appearance
 * Classification: Metallic

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.

Discovery of Ununpentium
Author: Dr. Doug Stewart Research scientists at the Joint Institute for Nuclear Research in Dubna, Russia and the Lawrence Livermore National Laboratory (LLNL), California believed they had made element 115, ununpentium, in Dubna, Russia in 2003. The work was a collaboration between science teams led by Yuri Oganessian and Ken Moody. The reaction was a fusion of element 20 with element 95: calcium-48 with americium-243. The experiment began on July 14, 2003 and ended on August 10, 2003. Calcium ions were formed into a beam in a cyclotron (a particle accelerator) and fired at a target layer of americium deposited on titanium foil. Four atoms of element 115 (ununpentium) may have been produced, which may have alpha decayed producing element 113 (ununtrium). The researchers believe one atom of ununpentium-287 was made, and three atoms of ununpentium-288 were made. The International Union of Pure and Applied Chemistry (IUPAC) reviewed the evidence for the discovery of ununpentium for several years. In 2011 they announced that there was insufficient evidence to prove that the element had been made in the cyclotron. The IUPAC report stated, "the results are encouraging but do not meet the criteria for discovery because of the paucity of events, the lack of connections to known nuclides, and the absence of cross-bombardments." As a result of its position in the periodic table ununpentium is expected to be classed as one of the "other metals" and to have similar properties to the metal bismuth. Too little of the element has been synthesized for this to be confirmed. The joint teams at JINR in Dubna and Lawrence Livermore in California have published evidence for the synthesis of elements 113, 114, 115, 116, 117 and 118. IUPAC has accepted the discoveries of element 114 (flerovium/ununquadium) and element 116 (livermorium/ununhexium). It has not yet considered the evidence for the discovery of element 117 (ununseptium). IUPAC requires stronger evidence before it will confirm the synthesis of element 113 (ununtrium), element 115 (ununpentium), or element 118 (ununoctium).

=Appearance & Characteristics=

Harmful effects: Ununpentium is harmful due to its radioactivity. Characteristics: Ununpentium is a synthetic radioactive metal and has only been produced in minute amounts.==Uses of Ununpentium== Ununpentium is of research interest only.