MDCAT Chemistry MCQ #798

Which of the following pairs shows an anomalous order in ionic radius due to isoelectronic series?

MDCAT Chemistry MCQ #798

  1. Question 1

    Q1. Which of the following pairs shows an anomalous order in ionic radius due to isoelectronic series?

    • A) Na⁺ and Mg²⁺
    • B) O²⁻ and F⁻
    • C) Cl⁻ and K⁺
    • D) Al³⁺ and Si⁴+

    Answer: Na⁺ and Mg²⁺

    Explanation: Na⁺ is larger than Mg²⁺ in the isoelectronic series. Option B follows charge-to-radius trends correctly.