Question

Perferential filling of 5f orbitals

Answer 1

Answer:

Hope you like it❣️

Explanation:

Going across the lanthanides in the periodic table, the 4f orbitals are usually being filled. As the valance orbital for lanthanides is 6s. Lanthanides called f-block elements because last electron in them enters into f-orbitals of the antepenultimate (i.e., inner to penultimate) shell partly but incompletely filled in their elementary or ionic states.

Answer 2

Explanation:

Going across the lanthanides in the periodic table, the 4f orbitals are usually being filled. As the valance orbital for lanthanides is 6s. Lanthanides called f-block elements because last electron in them enters into f-orbitals of the antepenultimate (i.e., inner to penultimate) shell partly but incompletely filled in their elementary or ionic states.