MDCAT Chemistry MCQ #951

What is the primary reason for the stability of a filled d-subshell in transition metals?

MDCAT Chemistry MCQ #951

  1. Question 1

    Q1. What is the primary reason for the stability of a filled d-subshell in transition metals?

    • A) Maximum number of unpaired electrons
    • B) Exchange energy from parallel spins
    • C) Shielding by inner d-electrons
    • D) Lower effective nuclear charge

    Answer: Exchange energy from parallel spins

    Explanation: Exchange energy stabilizes filled or half-filled subshells. Parallel spins reduce electron repulsion.