engineering physics MCQ #590

The ionization energy of a hydrogen atom is 13.6 eV. What is the ionization energy of He+?

engineering physics MCQ #590

  1. Question 1

    Q1. The ionization energy of a hydrogen atom is 13.6 eV. What is the ionization energy of He+?

    • A) 13.6 eV
    • B) 27.2 eV
    • C) 54.4 eV
    • D) 6.8 eV

    Answer: 54.4 eV

    Explanation: The ionization energy is proportional to Z². For He+, Z = 2, so ionization energy = 13.6 * 2² = 54.4 eV.