Question

The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because

• A. the $5f$ orbitals are more buried than the $4f$ orbitals
• B. there is a similarity between $4f$ and $5f$ orbitals in their angular part of the wave function
• C. the actinoids are more reactive than the lanthanoids
• D. the $5f$ orbitals extend further from the nucleus than the $4f$ orbitals

Answer 1

Answer: (D)

The actinoids exhibit more number of oxidation states in general than the lanthanoids. This is because the 5f orbitals extend further from the nucleus than the 4f orbitals.
Hence, (4) is correct.