Multiple choice Which of the following pairs contains diamagnetic metal ions only? Cu2+ and Fe3+ Sc3+ and Zn2+ Sc3+ and Fe3+ Sc3+ and Cu2+ Reveal answer Fill a bubble to check yourself B Correct answer Explanation Sc3+: 3d0, No unpaired electron-diamagnetic Zn2+: 3d10, No unpaired electron-diamagnetic