Compare the chemical properties of the Actinoid series with the Lanthanoid series. Which of the foll — d and f Block Elements Chemistry Question

💡 Solution & Explanation

(A) is true because $5f, 6d, 7s$ have comparable energies. (B) is true because the higher charge density and more spatially extended $5f$ orbitals in Actinoids allow better ligand interaction. (C) is true because $5f$ electrons shield the nucleus even worse than $4f$ electrons. (D) is false; it is the Actinoids that are all strictly radioactive, while all Lanthanoids (except Promethium) are non-radioactive.