What are lanthanides and actinides? – InterviewSolution

1.	What are lanthanides and actinides?
Answer» In 4f senes, 4f’orbitals arc being progressively filled with electrons, 4f^1-14 5d^0-1 6s² . These elements lie in 6^th period and are called rare earths or lanthanides or lanthanides. In 5f series, 5f orbitals are being progressively filled with electrons, 5f¹ 6d^0-1 7s² . These elements lie in 7^th period and are called actinides or actonones.

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