Why are lanthanides and actinides place at the bottom of the periodic table?

Lanthanides and actinides resemble in

(a) What is the difference between the electronic structures of transition and inner transition elements ? (b) Why are f-block elements placed at the bottom of the periodic table? Give the names of the series present in the block.

Lanthanides and actinides belong to ___________ block of the periodic table.

What is the position of lanthanide and actinide series in the periodic table ?

What is meant by lanthanides and actinides?

In the long or modern form of the periodic table, the element in the periodic table have been divided into four blocks, s-p-d -and f -. Each period begins with the filling of new energy shell. Two series of f -block elements are placed at the bottom of the periodic table. The element with Z=39 belongs to

In the long or modern form of the periodic table, the element in the periodic table have been divided into four blocks, s-p-d -and f -. Each period begins with the filling of new energy shell. Two series of f -block elements are placed at the bottom of the periodic table. Which of the following ions is most stable?