Why are f-block elements placed below the main table?

Why f-block elements are placed below the main table.

f-block elements are placed in

Why are f-block elements placed at the bottom of the periodic table ? Give the names of the series present in the block.

(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.

s-block elements are placed in

What are f-block elements? Where are they placed in the periodic table?

Why are d-block elements called transition elements ?