Compare the chemistry of actinides with that of Lanthanides with special reference to oxidation state

Compare the chemistry of actinides with that of the lanthanides with special reference to atomic and ionic sizes.

Compare the chemistry of actinides with that of the lanthanides with special reference to chemical reactivity.

Compare the chemistry of actinides with that of the lanthanoids with special reference to electronic Configuration.

Within each transition series, the oxidation states

The chemistry of the actinoid elements is not so smooth as that of the lanthanoids. Justify this statement by giving some examples from the oxidation state of these elements.

Although +3 is the characteristic oxidation State for lanthanoids but cerium also shows +4 oxidation state because ____________ .

What is the most common oxidation state in the Lanthanoids ?