The roots for 1, 1 and 5 are un, un and pent respectively. So, the symbol and IUPAC name of element with atomic number 115 is Uup and ununpentium respectively. The roots for 1, 0 and 7 are un, nil and sept respectively So, the symbol and IUPAC name of element with atomic number 107 are Uns and unnilseptium respectively.