a) One isotope of a metallic element has mass number 65 and 35 neutrons in the nucleus. The cation derived from the isotope has 28 electrons. Write the symbol for this cation.
b) One isotope of a nonmetallic element has mass number 80 and 45 neutrons in the nucleus. The anion derived from the isotope has 36 electrons. Write the symbol for this anion.