Dubnium
The Soviet Joint Institute for Nuclear Research (JINR) had said they first discovered the element in 1968, followed by the American Lawrence Berkeley Laboratory in 1970. Both teams shared their names for the new element and used them without formal approval. The long-standing argument was settled in 1993 by an official investigation of the discovery claims by the Transfermium Working Group, formed by the International Union of Pure and Applied Chemistry and the International Union of Pure and Applied Physics, resulting in credit for the discovery being officially shared between both teams. The element was then named dubnium in 1997 after the town of Dubna, the site of the JINR.