Tennessine
The experiment began in June 2009. In January 2010, the scientists at the Flerov Laboratory of Nuclear Reactions announced within the laboratory that they had found the decay of a new element with atomic number 117 through two decay chains. The odd-odd isotope does 6 alpha decays before doing a spontaneous (sudden) fission. The odd-even isotope does 3 alpha decays before fission. On 9 April 2010, an official report was released in the Physical Review Letters journal. It showed that the isotopes that were mentioned in the decay chains were 294Ts and 293Ts. The isotopes were made as follows: