A joint IUPAC–IUPAP Working Party (JWP) confirmed the discovery of element number 111. In accord with IUPAC procedures, the discoverers proposed a name and symbol for the element. The Inorganic Chemistry Division recommended this proposal for acceptance, and it was adopted by IUPAC on 1 November 2004. The recommended name is roentgenium with symbol Rg.
Pure Appl. Chem., Vol. 76, No. 12, pp. 2101–2103, 2004.
IUPAC Recommendations 2004
© 2004 IUPAC
IUPAC permission is acknowledged
