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Element Roentgenium (Unununium), Rg


The element 111 Roentgenium (symbol Rg) had been discovered 8th December 1994. The original name was Unununium (symbol Uuu). In accordance with the procedures established by IUPAC for the naming of elements, the name Roentgenium and the symbol Rg has been proposed for this noble metal analogous to copper, silver and gold in honour of famous scientists, Wilhelm Conrad Rontgen, the X-rays discoverer. The priority of the first preparing was granted by IUPAC to Sigurd Hofmann, et al at Gesellschaft fur Schwerionenforschung, Darmstadt, Germany.


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