Naming
Ununtrium is the lightest element that has not yet received an official name. Using Mendeleev's nomenclature for unnamed and undiscovered elements, ununtrium should be known as eka-thallium or dvi-indium. In 1979 IUPAC published recommendations according to which the element was to be called ununtrium (with the corresponding symbol of Uut), a systematic element name as a placeholder, until the discovery of the element is confirmed and a name is decided on. The recommendations are largely ignored among scientists, who call it "element 113", with the symbol of (113) or even simply 113.
Claims to the discovery of ununtrium have been put forward by both the Dubna and RIKEN teams. The IUPAC/IUPAP Joint Working Party (JWP) will decide to whom the right to suggest a name will be given. In 2011, the IUPAC evaluated the 2004 RIKEN experiments and 2004 and 2007 Dubna experiments, and concluded that they did not meet the criteria for discovery.
The following names have been suggested by the above-mentioned teams claiming discovery:
| Group | Proposed name | Derivation |
|---|---|---|
| RIKEN | Japonium (Jp) | Japan: country of group claimants |
| Rikenium (Rk) | RIKEN: institute of group claimants | |
| Nishinanium | Yoshio Nishina, Japanese physicist |
Read more about this topic: Ununtrium
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