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Atomic Number : 111Atomic symbolization : RgAtomic Weight : [ 281]Melting stop : UnknownBoiling Point : strange
Word root : Roentgenium is name for scientist Wilhelm Conrad Röentgen , who discovered X - rays .
Roentigenium
Discovery : Element 111 was break by the Gesellschaft fur Schwerionenforschung squad led by Peter Armbruster and Gottfried Münzenber in late 1994 . They give rise three atoms of272Rg .
Properties of element 111
Roentgenium is a radioactive , man-made element about which short is known . It is classified as a metal and is expected to be solid at room temperature .
Roentgenium has seven isotopes whose half - lives are known . The most static isotope is281Rg , with a half - life of about 26 seconds . It dilapidate through ad-lib fission .
Sources of roentgenium
atomic number 111 is produced artificially . The team that fall upon it bombarded atoms ofbismuthwith ion ofnickelin a linear accelerator to produce component 111 .
The nuclear weight for manmade transuranium elements is base on the longest - live isotope in the occasional tabular array . These atomic weights should be deal provisional since a unexampled isotope with a longer half - life could be make in the future . [ See Periodic mesa of the Elements ]
Uses of element 111
Only a few atom of roentgenium have ever been made , and they have no current lotion outside of scientific sketch .
( Sources : Los Alamos National Laboratory , Jefferson Lab )
