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About: Isotopes of roentgenium     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Substance100019613, within Data Space : dbpedia.org associated with source document(s)

Type: yago:Abstraction100002137yago:Atom114619225yago:Isotope114619658yago:Matter100020827yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatIsotopesOfRoentgeniummilitary unityago:Substance100019613 New Facet based on Instances of this Class

Roentgenium (111Rg) is a synthetic element, and thus a standard atomic weight cannot be given. Like all synthetic elements, it has no stable isotopes. The first isotope to be synthesized was 272Rg in 1994, which is also the only directly synthesized isotope; all others are decay products of heavier elements. There are 7 known radioisotopes from 272Rg to 282Rg. The longest-lived isotope is 282Rg with a half-life of 2.1 minutes, although the unconfirmed 283Rg and 286Rg may have longer half-lives of about 5.1 minutes and 10.7 minutes respectively.