Chemistry Isotopes Solution: Consider the following three pairs of species: I....

Solution: Consider the following three pairs of species: I. 55Fe3+ and 56Fe2+ II. Na+ and Ne III. 13C and 14C Which of the following statements is  NOT true?   A) I and III both contain pairs of isotopes. B) II shows two species with different number of electrons. C) III shows two species with different mass numbers, but the same atomic numbers. D) I shows two species with the same number of protons.