Q. Which of the following exhibits only +3 oxidation state?
A) U
B) Th
C) Ac
D) Pa
Explanation
[Solution from source] Actinium (5f⁰) shows only the +3 oxidation state. Thorium is mainly +4, protactinium up to +5 and uranium shows +3 to +6. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.