Answer to Question #25000 in Inorganic Chemistry for sadaf sadeghi

Question

why the Lanthanides and Actinides moved to the bottom of the periodic table?

Answer 1

Lanthanide group is similar in chemical structure tothe lanthanum (the same with the actinides),in order that the table would have a compact form they were moved down from table. This table even called something like an incomplete, and in complete they all come in order for lanthanum and actinium.