Russian, American and Japanese scientists have added four new elements to the periodic table. The seventh row in the table is now complete, and textbooks will be changed in days to come.
Elements with atomic numbers 113, 115, 117 and 118 now complete the seventh row of the periodic table, according to the official announcement made by the International Union of Pure and Applied Chemistry or IUPAC. The next step is to have these elements permanently named and assigned their symbols. The Japanese team would want to explore the next element with atomic number 119.
Element 113 was temporarily assigned the name ununtrium and the symbol Uut. Element 115 was assigned for the time being the name ununpentium and the symbol Uup; 117 was assigned ununseptium and Uus; and 118 was assigned the name ununoctium and the symbol Uuo.
Scientists from the Joint Institute for Nuclear Research in Dubna, Russia; Lawrence Livermore national laboratory, California, USA; and Oak Ridge National Laboratory, Oak Ridge, Tennesse, USA were responsible for finding elements 115, 117 and 118. They will also be the ones assigned to propose the permanent names and symbols. The scientists from the RIKEN group in Japan were the ones who found element 113 and will also be assigned to suggest a permanent name and symbol.
The RIKEN collaboration team in Japan have fulfilled the criteria for element Z=113 and will propose a permanent name and symbol.
“As the global organization that provides objective scientific expertise and develops the essential tools for the application and communication of chemical knowledge for the benefit of humankind, the International Union of Pure and Applied Chemistry is pleased and honored to make this announcement concerning elements 113, 115, 117, and 118 and the completion of the seventh row of the periodic table of the elements,” IUPAC President, Dr. Mark Cesa, said in the announcement.
Kosuke Morita, the lead scientists of the RIKEN group in Japan, said his team is now planning to find element 119 and beyond. “Now that we have conclusively demonstrated the existence of element 113, we plan to look to the uncharted territory of element 119 and beyond, aiming to examine the chemical properties of the elements in the seventh and eighth rows of the periodic table, and someday to discover the island of stability,” Morita said in a separate announcement.