(Solved): any help would highly appreciate. please put formula on how to do it.  Complete the isotope sym ...

Complete the isotope symbol with mass numbers of 35. Express your answer as an isotope. An element used to sanitize water supplies has two naturally occurring isotopes with mass numbers of 35 and 37 , and 17 electrons. Write the symbols for both isotopes, including their atomic numbers and mass numbers: Part B Complete the isotope symbol with mass numbers of 37. Express your answer as an isotope.