Question

Lanthanoid elements have :

• A. similar lattice and solvation energies but widely different ionization energies
• B. similar lattice and ionization energies but widely different solvation energies
• C. similar ionization and solvation energies but widely different lattice energies
• D. similar lattice, solvation and ionization energies

Answer 1

The correct option is D similar lattice, solvation and ionization energies

Going across the lanthanide series in the periodic table, the $4f$ orbitals are usually being filled. Due to the poor screening effect of inner $4f$ orbitals, the difference in the size of the elements is not very high. They show similar oxidation states and crystal field effects are also minimum.

Hence, lanthanoid elements have a similar lattice, solvation and ionization energies.