If M is the element of actinoid series, the degree of complex formation decrease in the order

In case of actinoids, the degree of complex formation decreases as :

Assertion : The degree of complex formation in actinides decreases in the order : Actinides form complexes with T-bonding ligands such as alkyl phosphines and thioethers.

Lanthanoids and actinoids are f-block elements in which the last electron enters the anti-penultimate energy level. The most common oxidation state of lanthanoids is +3, though +2 and +4 oxidation states are exhibited by some of the elements. In lanthanoid series, there is a progressive decrease in atomic and ionic radii, known as lanthanoid contraction. Unlike lanthanoids, actinoids show a large number of oxidation states. Which is the last element of the actinoid series? Write its electronic configuration.

Lanthanoids and actinoids are f-block elements in which the last electron enters the anti-penultimate energy level. The most common oxidation state of lanthanoids is +3, though +2 and +4 oxidation states are exhibited by some of the elements. In lanthanoid series, there is a progressive decrease in atomic and ionic radii, known as lanthanoid contraction. Unlike lanthanoids, actinoids show a large number of oxidation states. Name an element of lanthanoid series, which is known to show +4 oxidation state. Is it a strong oxidising agent or reducing agent?

Which is the last element of actinoid series ? Write the electronic configuration of this element. Comment on the posible oxidation state of this element.

d-block elements have tendency for complex formation because of