Oganesson (Og), a transuranium element that occupies position 118 in the periodic table and is one of the noble gases. Oganesson is a synthetic element, and in 1999 scientists at Lawrence Berkeley National Laboratory in Berkeley, California, announced the production of atoms of oganesson as a result of the bombardment of lead-208 with atoms of krypton-86. However, in 2002 this result was retracted after it was discovered that some of the data had been falsified. No physical or chemical properties of oganesson can be directly determined, since only a few atoms of oganesson have been produced, but it is likely that oganesson is a gas at room temperature. The chemistry of oganesson, like radon, is expected to reflect its anticipated metalloid properties. Continue reading from Encyclopedia Britannica
On October 16, 2006, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory, announced the creation of oganesson. They produced oganesson by bombarding atoms of californium-249 with ions of calcium-48. This produced oganesson-294, an isotope with a half-life of about 0.89 milliseconds (0.00089 seconds), and three free neutrons. The californium target was irradiated with a total of 1.6*1019 calcium ions over the course of 1080 hours, resulting in the production of three atoms of oganesson. Continue reading from JLab Science Education
Oganesson has one known isotope, 294Og, with a half-life of about 0.89 milliseconds. Through alpha decay, it turns into 290Lv (livermorium-290). Since only a few atoms of oganesson have ever been made, it has no practical uses outside of scientific study. The Russian scientists who produced oganesson bombarded atoms of californium with ions of calcium for 1,080 hours. This resulted in three atoms of oganesson. Continue reading from LiveScience
