Nuclear Chemistry

 16) (a) ¹¹²₄₈Cd is more abundant because it has an even number of protons (48) and neutrons (64).

       (b) ²⁷₁₃Al is more abundant because it has an odd number of protons (13) and an even number of neutrons (14). There are very few stable nuclei having an odd number of both protons and neutrons ruling out ³⁰₁₃Al.

       (c) ¹⁰⁶₄₆Pd is more abundant because it has an even number of protons (46) and neutrons (60).

       (d) ¹²⁸₅₄Xe is more abundant because it has an even number of protons (54) and neutrons (74).