MDCAT Chemistry MCQ #827

Which element's atomic radius is smaller than its +2 cation?

MDCAT Chemistry MCQ #827

  1. Question 1

    Q1. Which element's atomic radius is smaller than its +2 cation?

    • A) Magnesium
    • B) Calcium
    • C) Strontium
    • D) Barium

    Answer: Magnesium

    Explanation: Mg²+ has fewer electrons but same charge, reducing radius. Other options form larger cations.