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Question

Which ion among the following isoelectronic species with 18 electrons has the highest polarizing power?

Options

Choose one · Correct answer highlighted

Explanation

For isoelectronic species (18 electrons), polarizing power increases with charge and decreases with size. Sc³⁺ (Z=21, +3) has the highest polarizing power compared to K+, Ca²⁺, or Cl⁻.