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.[1]
Properties
| General |
|---|
| Name : roentgenium |
| Symbol : Rg |
| Atomic Number : 111 |
| Chemical Series : Transition Metal |
| Block, Period : 11, 7 |
| Appearance : unknown |
| Atomic Properties |
| Atomic Weight : 280 |
| Covalent Radius (pm) : n/a |
| Physical Properties |
| Matter : presumably a solid (radioactive) |
| Density (kg/ |
| Hardness : n/a |
| Melting Point (K) : n/a |
| Boiling Point (K) : n/a |
| Evaporation Heat (kJ/mol) : n/a |
| Fusion Heat (kJ/mol) : n/a |
| Specific Heat (J/(kg*K) ) : n/a |
| Miscellaneous |
| Electrical Conductivity ( |
| Thermal Conductivity (W/(m*K) ) : n/a |
Notes
[1] From Los Alamos National Laboratory's Chemistry Division Website
Top of Page