noun🔗Shareलैन्थनाइड्सAny 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. "रसायनज्ञ लैन्थनाइड्स के गुणों का अध्ययन करते समय उन्हें एक साथ समूहित करते हैं क्योंकि ये तत्व रासायनिक प्रतिक्रियाओं में समान रूप से व्यवहार करते हैं।elementchemistryscienceChat with AIVocabulary GamePractice Reading