GKFix MCQ Question

What is the primary reason Scandium (Sc) is considered a transition element?

• A. Because Sc has an incomplete d-subshell in its ground state.
• B. Because Sc is a metal.
• C. Because Sc^3+ has an empty d-subshell (d^0), which is a stable configuration characteristic of transition elements.
• D. Because Sc is located in the d-block.