 Using Mendeleev's nomenclature for unnamed and undiscovered elements, element 117 should be known as "eka-astatine".Using the 1979 recommendations by the International Union of Pure and Applied Chemistry (IUPAC), the element was temporarily called "ununseptium" (symbol "Uus") until its discovery was confirmed and a permanent name chosen; the temporary name was formed from Latin roots "one", "one", and "seven", a reference to the element's atomic number of 117.Many scientists in the field called it "element 117", with the symbol "E117", "(117)", or "117".