MDCAT Chemistry MCQ #803

Why is the electron configuration of palladium [Kr]4d¹⁰ instead of [Kr]4d⁸5s²?

MDCAT Chemistry MCQ #803

  1. Question 1

    Q1. Why is the electron configuration of palladium [Kr]4d¹⁰ instead of [Kr]4d⁸5s²?

    • A) Fully filled d-subshell stability
    • B) Greater shielding in 4d orbitals
    • C) Lower energy of 4d compared to 5s
    • D) Anomalous magnetic properties

    Answer: Fully filled d-subshell stability

    Explanation: Palladium's 4d¹⁰ configuration maximizes stability. Option C misstates orbital energy order.