How will you account for the following?
(i) Actionoids exhibit more number of oxidation states than lanthanoides.
ii) Atomic fadii of second and third transition series elements are almost identical.

How will you accout for the following ? (i) Actinoids exhibit more number of oxidation states than lanthanoids. (ii) Atomic radii of second and third transition series elements are almost identical.

Explain why the members of the actinoid series exhibit a large number of oxidation states than the corresponding members of the lanthanoid series.

How would you account for the following: (i) Cr^(2+) is reducing in nature while with the same d-orbital configuration (d^4) Mn^(3+) is an oxidising agent. (ii) In a transition series of metals, the metal which exhibits the greatest number of oxidation state occurs in the middle of the series.

Give reasons : (i) Actinoids show variable oxidation states. (ii) Zr and Hf have almost identical radii.

Assign reasons for the following: (i) Copper (I) ion is not known in aqueous solution. (ii) Actinoids exhibit greater range of oxidation states than lanthanoids.

Name the metal of the 1^(st) row transition series that Exhibits maximum number of oxidation states.

Give reasons: i) Actinoids show variable oxidation state. ii) Zr and Hfhave almost identical radii.