MDCAT Chemistry MCQ #957

Why does the second ionization energy of an element always exceed the first?

MDCAT Chemistry MCQ #957

  1. Question 1

    Q1. Why does the second ionization energy of an element always exceed the first?

    • A) Increased shielding after the first electron is removed
    • B) Greater effective nuclear charge after the first electron is removed
    • C) Lower energy due to electron-electron repulsion
    • D) Electron promotion to higher subshells

    Answer: Greater effective nuclear charge after the first electron is removed

    Explanation: Removing a second electron faces stronger nuclear attraction. Shielding decreases after the first ionization.