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Periodic Table of Elements: LANL

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Roentgenium is named after Wilhelm Conrad Röntgen. Roentgenium is named after Wilhelm Conrad Röntgen.

Roentgenium

Atomic Number: 111 Atomic Radius: empirical: 138 pm (predicted)[2][4]
Atomic Symbol: Rg Melting Point: --
Atomic Weight: 282 Boiling Point: --
Electron Configuration: [Rn] 7s2 5f14 6d9(predicted)[1][2] Oxidation States: 5, 3, 1, −1 ​(predicted)[2][4]

History

Discovered by Gesellschaft Schwerionenforschung (GSI) in Darmstadt, in 1994. Reasearch group of S. Hofmann, V. Ninov, F.P. Hessberger, P. Armbruster, H. Folger, G. Munzenberg, H.J. Schott, and others.

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