MDCAT Chemistry MCQ #824

Why is the first ionization energy of nitrogen higher than oxygen?

MDCAT Chemistry MCQ #824

  1. Question 1

    Q1. Why is the first ionization energy of nitrogen higher than oxygen?

    • A) Nitrogen has a half-filled p³ orbital
    • B) Oxygen has a lower nuclear charge
    • C) Nitrogen is more electronegative
    • D) Oxygen has a smaller atomic radius

    Answer: Nitrogen has a half-filled p³ orbital

    Explanation: Half-filled p³ orbitals in nitrogen are more stable, making IE higher. B and D contradict the trend.