Ununseptium (; officially, the two initial u's are to be pronounced )'s the temporary name of an undiscovered chemical element in the periodic table that's the temporary symbol Uus and the atomic number 117. Future experiments Ununseptium hasn't yet been discovered, and no attempt to synthesize this element has been reported. However, there're now indications from GSI and the Flerov Laboratory of Nuclear Reactions that they'll study the reaction 249Bk + 48Ca in the near future. The GSI have… (More on Ununseptium)