noun🔗ShareLanthanidesAny of the 14 rare earth elements from cerium (or from lanthanum) to lutetium in the periodic table; because their outermost orbitals are empty, they have very similar chemistry; below them are the actinides."Chemists studying the properties of the lanthanides group them together because these elements behave similarly in chemical reactions. "Les chimistes qui étudient les propriétés des lanthanides les regroupent car ces éléments se comportent de manière similaire dans les réactions chimiques.elementchemistryscienceChat with AIVocabulary GamePractice Reading
