Selected properties of antimony (Sb) and iodine (I) are listed in the table below.ElementAtomic radius(pm)First ionization energy(kJ/mol)Electron affinity(kJ/mol)ElectronegativitySb145?–1032.05I1401008–295?Which predictions can most likely be made?

Sb and I are in the same period, and both first ionization energy and electronegativity generally increase from left to right across a period. Sb is to the left of I, so Sb is predicted to have a lower ionization energy and a lower electronegativity than I. This matches choice C.

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