Why are actinoids called inner transition elements? – InterviewSolution

1.	Why are actinoids called inner transition elements?
Answer» Actinoids are 5f-series elements in which electrons progressively enter into 5f-orbitals, which are inner orbitals. They have electronic configuration [Rn]⁸⁶ 5f^1-14 6d^0-1 7s². They show intermediate properties as compared to electropositive 5-block elements and electronegative p-block elements. Hence they are called second inner transition elements.

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