MDCAT Chemistry MCQ #766

The energy required to remove an electron from the ground state of He+ is 54.4 eV. Calculate the energy required to remove both electrons from He.

MDCAT Chemistry MCQ #766

  1. Question 1

    Q1. The energy required to remove an electron from the ground state of He+ is 54.4 eV. Calculate the energy required to remove both electrons from He.

    • A) 79 eV
    • B) 108.8 eV
    • C) 54.4 eV + 24.6 eV
    • D) 108.8 eV + 24.6 eV

    Answer: 54.4 eV + 24.6 eV

    Explanation: First electron removal energy = 24.6 eV, second = 54.4 eV, total = 79 eV. Option D incorrectly adds IE of He+ twice.