What are inner transition elements? – InterviewSolution

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1.	What are inner transition elements?
Answer» Solution :The inner transition elements have two SERIES of elements. (i) Lanthanoids (ii) Actinoids 2. Lanthanoid series consists of 14 elements from Cerium`""_(58)Ce`to Lutetium`""_(71)Lu` following LANTHANUM`""_(57)La`. These elements are characterised by the PREFERENTIAL filling of 4f orbitals. 3. Actinoids consists of 14 elements from Thorium`""_(90)Th`to Lawrencium`""_(103)Lr`following Actinium`""_(89)Ac`. These elements are characterised by the preferential filling of 5F orbital.`

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