what are lanthanides and actinides
All metals are placed at the left side of the periodic table. Around 75% of elements are metallic in nature and belong to s, d and f-blocks. The non-metals and metalloids are placed in p-block with few metals. The elements of f-block are also called as Lanthanides and Actinides.These names come from the Lanthanum and Actium after which, both series of f-block are started.ses of Lanthanides and Actinides. 1  They donât find any use in their pure state. 2  They are used in the production of alloys of steel to improve the strength and workability of steel. 3  A well known alloy is mischmetal which is used in making magnesium based alloy (Mg mixed with 3% of mischmetal).