MDCAT Chemistry MCQ #867

Why is the second ionization energy of an element always higher than the first?

MDCAT Chemistry MCQ #867

  1. Question 1

    Q1. Why is the second ionization energy of an element always higher than the first?

    • A) Shielding increases after first ionization
    • B) Electron-electron repulsion decreases after first ionization
    • C) Effective nuclear charge decreases after first ionization
    • D) The remaining electron is closer to the nucleus after first ionization

    Answer: The remaining electron is closer to the nucleus after first ionization

    Explanation: Removing an electron from a positively charged ion (post-first ionization) requires more energy. Option B is a distractor because repulsion actually decreases, aiding removal.