MDCAT Chemistry MCQ #778

The energy of the electron in the ground state of hydrogen is -13.6 eV. What is the energy in the ground state of Li2+?

MDCAT Chemistry MCQ #778

  1. Question 1

    Q1. The energy of the electron in the ground state of hydrogen is -13.6 eV. What is the energy in the ground state of Li2+?

    • A) -122.4 eV
    • B) -54.4 eV
    • C) -13.6 eV
    • D) -27.2 eV

    Answer: -122.4 eV

    Explanation: E ∝ Z^2, Li2+ has Z=3, E = -13.6 × 3^2 = -122.4 eV. Option B is for He+.