Recently discovered elements

The first transuranium element (element with atomic number greater than 92) discovered was neptunium in 1940. As of February 2010, only the elements up to 112, copernicium, have been confirmed as discovered by IUPAC, while more or less reliable claims have been made for synthesis of elements 113, 114, 115, 116, 117[17] and 118. The discovery of element 112 was acknowledged in 2009, and the name 'copernicium' and the atomic symbol 'Cn' were suggested for it.[18] The name and symbol were officially endorsed by IUPAC on February 19, 2010.[19] The heaviest element that is believed to have been synthesized to date is element 118, ununoctium, on October 9, 2006, by the Flerov Laboratory of Nuclear Reactions in Dubna, Russia.[20][21] Element 117 was the latest element claimed to be discovered, in 2009.[17]

A 2008 claim by Amnon Marinov and six other researchers for discovery of naturally existing element 122[22][23] was criticized by other scientists, and turned down without peer review by both Nature and Nature Physics

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