Neither. Magnesium is an alkaline earth metal (group II).
They sure are! :)
The set of chemically related elements with properties similar to those of lanthanum, with atomic numbers from 57 to 71; the rare-earth elements.
The Lanthanide and Actinide series are at the bottom of the periodic table of elements because if they were where they were supposed to be, then the table would be way too long. The Lanthanide series...