MDCAT Chemistry MCQ #797

Why does the 4s orbital lose electrons before the 3d orbital in transition metal cations?

MDCAT Chemistry MCQ #797

  1. Question 1

    Q1. Why does the 4s orbital lose electrons before the 3d orbital in transition metal cations?

    • A) 4s orbital is higher in energy than 3d in atoms
    • B) 4s electrons are shielded more effectively
    • C) 3d electrons have greater penetration
    • D) 4s electrons experience stronger nuclear attraction

    Answer: 4s orbital is higher in energy than 3d in atoms

    Explanation: The 4s orbital is higher in energy than 3d after ionization. Option B incorrectly describes shielding effects.