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PIMSO 2022 - Science - Grade 9 - National Round Question 11

PIMSO Science · PIMSO 2022 - Science - Grade 9 - National Round

Question 11

The following species have the same electronic configuration. Which would have the smallest atomic radius?
  1. S²⁻
  2. Cl⁻
  3. Ar
  4. K⁺
  5. Ca²⁺