MDCAT Chemistry MCQ #970

Which particle has the smallest radius among isoelectronic species O2-, F-, Ne, and Na+?

MDCAT Chemistry MCQ #970

  1. Question 1

    Q1. Which particle has the smallest radius among isoelectronic species O2-, F-, Ne, and Na+?

    • A) Na+
    • B) Ne
    • C) F-
    • D) O2-

    Answer: Na+

    Explanation: Na+ has +11 charge pulling electrons more tightly than others. Isoelectronic series radius decreases with higher nuclear charge.