MDCAT Chemistry MCQ #933

Why does the third ionization energy of aluminum increase sharply?

MDCAT Chemistry MCQ #933

  1. Question 1

    Q1. Why does the third ionization energy of aluminum increase sharply?

    • A) Electron is removed from a noble gas core
    • B) Aluminum has a d-block contraction
    • C) Penetration effects of p-orbitals
    • D) Increased shielding from inner electrons

    Answer: Electron is removed from a noble gas core

    Explanation: Third IE removes core electrons (A). Shielding (D) decreases, not increases.