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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.
