engineering physics MCQ #554

The ratio of the ionization energies of hydrogen and helium is

engineering physics MCQ #554

  1. Question 1

    Q1. The ratio of the ionization energies of hydrogen and helium is

    • A) 1 / 4
    • B) 1 / 2
    • C) 1 / 1
    • D) 4 / 1

    Answer: 1 / 4

    Explanation: E1(H) = 13.6 eV, E1(He+) = 54.4 eV, ratio = 13.6 / 54.4 = 1 / 4.