MDCAT Physics MCQ #274

The ionization energy of hydrogen is 13.6 eV. What is the energy required to remove an electron from He+?

MDCAT Physics MCQ #274

  1. Question 1

    Q1. The ionization energy of hydrogen is 13.6 eV. What is the energy required to remove an electron from He+?

    • A) 13.6 eV
    • B) 27.2 eV
    • C) 54.4 eV
    • D) 108.8 eV

    Answer: 54.4 eV

    Explanation: Ionization energy is proportional to Z^2; for He+, Z = 2, so energy required is 4 * 13.6 = 54.4 eV.