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The lanthanides are d-block elements.(a) True(b) FalseI have been asked this question by my college professor while I was bunking the class.Query is from D and F-Block Elements in section D and F-Block Elements of Chemistry – Class 12

Answer»

The correct choice is (b) False

Easiest explanation: The lanthanides are ELEMENTS in which the differentiating electron ENTERS (n-2)f-orbital of anti-penultimate SHELL and are CALLED as f-block elements. These have three outer shells incomplete. Thus, lanthanides are f-block elements, not d-block.



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