The d-And-f-Block Elements

The d-And-f-Block Elements

Question

Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.

Answer

Similarities between lanthanides and actinides

  1. Both have a prominent oxidation state of +3.
  2. They are involved in the filling of (n-2) f orbitals.
  3. They are highly electropositive and very reactive in nature.

Differences between lanthanides and actinides

  1. Lanthanoids are involved in the filling of 4f- orbitals whereas actinoids are involved in the filling of 5f-orbitals.
  2. The binding energy of 4f electrons is comparatively less than that of 5f-electrons. The shielding effect of 5f-electrons is less effective as compared to that of 4f-electrons.
  3. The paramagnetic properties of lanthanoids can be easily explained but this explanation is difficult in the case of actinoids.

More Chapters from The d-And-f-Block Elements