Lanthanides are – InterviewSolution

1.	Lanthanides are
Answer» 14 elements in the `7^(th)` PERIOD filling 4f orbitals 14 elements in the `5^(th)` period filling 5T orbitals 14 element in the `5^(th)` period filling 5t orbitals 14 elements in the `4^(th)` period that are filling 4f orbitals ANSWER :B

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