Complex sentence: Ununoctium (element symbol Uuo) is the temporary name of a transactinide element that was first synthesized in 2002 by a joint team of Russian and American scientists at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia.
Split into simpler sentences: Ununoctium (element symbol Uuo) is the temporary name of a transactinide chemical element. It was first synthesized in 2002 by a joint team of Russian and American scientists at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia.