Original: It is placed as the heaviest member of group 15 (VA) although a sufficiently stable isotope is not known at this time that would allow chemical experiments to confirm its position.
Simplified: On February 2 2004 a report that ununpentium and ununtrium were made was written in a journal named Physical Review C/ORGANIZATION. The report was written by a team of Russian scientists at Dubna Universitys Joint Institute for Nuclear Research and American scientists at the Lawrence Livermore National Laboratory/ORGANIZATION.,