MDCAT Chemistry MCQ #790

Which ion has the highest third ionization energy?

MDCAT Chemistry MCQ #790

  1. Question 1

    Q1. Which ion has the highest third ionization energy?

    • A) Al²⁺
    • B) Mg²⁺
    • C) Na⁺
    • D) Si²⁺

    Answer: Al²⁺

    Explanation: Al³⁺ formation removes an electron from a noble gas core (option A). Mg²⁺ (option B) has fewer protons, requiring less energy.