Roentgenium

Atomic Number: 111 Atomic Radius:  —
Atomic Symbol: Rg Melting Point:  —
Atomic Mass: 280 Boiling Point:  —
Electron Configuration: Oxidation States:  —
Wilhelm Conrad Röntgen
Roentgenium was named after Wilhelm Conrad Röntgen.

History

Discovered by Gesellschaft Schwerionenforschung (GSI) in Darmstadt, in 1994.

Source:

Los Alamos National Laboratory, Periodic Table of Elements, http://periodic.lanl.gov/list.shtml.