Question

Lanthanoids form primarily +3 ions, while the actinoids usually have higher oxidation states in their compounds, +4 or even +6 being typical. Give reason. [Delhi 2012]

Answer 1

Answer:

HEY MATE

Explanation:

Transition metals exist in hcc geometry in which there is vacant spaces. In these vacant spaces the elements like C, H & O forms compounds called interstitial compounds.

II) Due to lanthanide contraction, the metallic radii of the third (5d) series of transition metals are virtually the same as those of the corresponding group members of the seconds (4d) series.

"The steady decrease in the values of the radii of M

3+

cations in the lanthanide series is called as Lanthanide contraction."

III) This is because of the compareble energies of 5f, 6d and 7s orbitals so all of them can participate... hope it helps uh..

@tripathipriya