Correct Answer is : 14 elements in the sixth period (atomic no. 58 to 71 ) that are filling 4f sublevel

14 elements in the seventh period (atomic no. =90 to 103 ) that are filling 5 {\f} sublevel.

14 elements in the sixth period (atomic no. 58 to 71 ) that are filling 4 f sublevel

14 elements in the seventh period (atomic no. =58 to 71 ) that are filling 4 {\f} sublevel

14 elements in the sixth period (atomic no. 90 to 103 ) that are filling 4 f sublevel

AIPMT 2004 Physics and Chemistry Paper

Question : 51 of 100

Marks: +1, -0

Lanthanoids are :-

14 elements in the seventh period (atomic no. =90 to 103 ) that are filling 5f sublevel.
14 elements in the sixth period (atomic no. 58 to 71 ) that are filling 4f sublevel
14 elements in the seventh period (atomic no. =58 to 71 ) that are filling 4f sublevel
14 elements in the sixth period (atomic no. 90 to 103 ) that are filling 4f sublevel

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