Question

Predict Which of the following transition metal ions has a color: Cr3+ Cd2+ Hg+2 V2+. Explain

Answer 1

Answer:

Cr3+ is green and V2+ is purple. Cr3+ and V2+ are both d3 so there can be a lot of movement between energy levels to produce colored light. Cd2+ and Hg2+ are both d10 (full d orbital, much less electron movement).

Explanation: