GKFix MCQ Question

What is Gadolinium (Gd) notable for in terms of its electronic configuration and magnetism?

• A. It has a filled 4f subshell and is diamagnetic
• B. It has no 4f electrons and is weakly paramagnetic
• C. It has a half-filled 4f subshell (4f⁷) and is highly paramagnetic
• D. It is the only lanthanoid that is ferromagnetic