In each of thefollowingquestionsa Statementof Assertion(A ) isgivenfollowedby acorrespondingstatementof Reason(R ) Justbelow it . Of thestatementmarkthe correctanswer asAssertion.The elementwithelectronicconfiguration[Xe]^(54)4f^(1)5d^(1)6s^(2)isd- blockelement Reason . the lastelectronentersthe d-orbital.

In each of thefollowingquestionsa Statementof Assertion(A ) isgivenfol

1.	In each of thefollowingquestionsa Statementof Assertion(A ) isgivenfollowedby acorrespondingstatementof Reason(R ) Justbelow it . Of thestatementmarkthe correctanswer asAssertion.The elementwithelectronicconfiguration[Xe]^(54)4f^(1)5d^(1)6s^(2)isd- blockelement Reason . the lastelectronentersthe d-orbital.
Answer» Solution :Correctassertion . Elementwith ELECTRONICCONFIGURATION`[Xe] ^(54)4f^(1) 5d^(1) 6s^(2) ` is a f-blockelement . Correct reason. The lastelectronentersthe f- blockorbital