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Name Roentgenium
Symbol Rg
Atomic number 111
Atomic mass 272 amu
Normal state Presumed to be a Solid
Classification Transactinides
Crystal structure Unknown
Color Unknown
Date of discovery 1994
Name of discoverer S.Hofmann, V.Ninov, F.P.Heßberger, P.Armbruster, H.Folger, G.Münzenberg and H.J.Schött
Name origin Named after the discoverer of X-Rays, Wilhelm Conrad Roentgen.
Uses Research interest only.
Obtained from Synthetically produced element normally produced by fusing two lighter elements in a heavy ion accelerator.