|The synthesis of chemical elements 113, Ununtrium and element 115, Ununpentium were reported on February 2004 by scientist from Flerov Laboratory of Joint Institute for Nuclear Research (Dubna) and Lawrence Livermote National Laboratory (Livermore, California). Japanese scientist from RIKEN (Japan) carried out another pathway for Ununtrium synthesis.|
The name Ununtrium (symbol Uut)is a temporary IUPAC systematic chemical element name. This name will be changes in future. Because Japanese scientists were carried out some research of this element, they proposed names Japonium (symbol Jp) and Rikenium (symbol Rk).