Question

Actinides have higher tendency to form complexes than Lanthanides, due to

• A. Higher charge and smaller size
• B. Smaller charge and larger size
• C. They are radioactive
• D. They are electropositive

Answer 1

The correct option is A Higher charge and smaller size

Actinides have higher tendency to form complexes than Lanthanides, due to higher charges and smaller size of cations of actinides. This results in higher charge density and high effective nuclear charge. This facilitates the acceptance of lone pairs of electrons from ligands.