Final answer:
Antimony (Sb) has the highest average number of neutrons among the elements provided.
Explanation:
Antimony (Sb) has the greatest average number of neutrons among the given elements. Antimony has 51 protons, and the number of neutrons varies depending on the isotope. The most abundant isotope of antimony is ₁₂₃Sb with a larger natural abundance compared to other isotopes.
Learn more about Isotopes and Neutrons here:
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