Q. The reason for greater range of oxidation states in actinoids is attributed to :
A) the radioactive nature of actinoids
B) actinoid contraction
C) 5f, 6d and 7s levels having comparable energies
D) 4f and 5d levels being close in energies
Explanation
[Solution] The 5f, 6d and 7s orbitals are close in energy, so varying numbers of electrons can take part in bonding. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.