Tennessine was synthesised in 2009 in the Flerov Laboratory of Nuclear Reactions in Dubna, Russia. The research team was led by Yuri Oganessian in collaboration with many American institutes. The element is named after Tennessee, in recognition of the role the American state played in the research conducted. Tennessne was made by the fusion of calcium 48 and berkelium 249 using a particle accelerator. It took 70 days and the acceleration of 7 trillion calcium ions to 10% the speed of light to successfully create the atom.
Joint Institute for Nuclear Researh, Lawrence Livermore National Laboratory, Vanderbilt University and Oak Ridge National Laboratory