Lanthanoids and actinoids.

What are Lanthanoid and actinoids. Give their positions in modern periodic table.

State one differnece between Lanthanoid and Actinoid.

What are f-block elements? Distinguish between lanthanoid and actinoid.

(i)with reference to structural variability and chemical reactivity write the differences between lanthanoids and actinoids (ii) Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state

which block elements are called Lanthanoids / actinoids ?

Why is the atomization energy of transition elements too high? Which one show more number of oxidation states between lanthanoid and actinoid?

Select the correct statements (s) for the comparision of lanthanoids with actinoids.