Why the actinoids exhibit a large number of oxidation states than the corresponding lanthanoids ?

How would you account for the following ? The actinoids exhibit a larger number of oxidation states than the corresponding members in the lanthanoid series.

Transition elements exhibit a large number of oxidation states.Explain.

Which of the following exhibits the greatest number of oxidation states?

Assertion : Lanthanoids show a limited number of oxidation states whereas actinoids show a large number of oxidation states. Reason : Energy gap between 4f, 5d and 6s subshells is small whereas that between 5f. 6d and 7s subshells is large.

Which of the 3d-series of transition elements exhibits the largestn number of oxidation states and why ?

What are different oxidation states exhibited by lanthanoids ?

What is the most common oxidation state in the Lanthanoids ?

How would you account for the following: There is a greater range of oxidation states among the actinoids than among the lanthanoids.