Identify the incorrect statements among the following

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lanthanoids contraction is the accumulation of successive linkages

as a result of lanthanoids contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of transition elements

shielding power of 4f electrons is quite weak

there is a decrease in the radii of the atoms or ions as one proceeds from La to Lu

answer is B.

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Detailed Solution

In each vertical column of transition element, the elements of second and third transition series resemble each other more closely than the elements of first and second transition series on account of lanthanoids contraction. Hence, the properties of elements of 4d series of the transition elements resemble with the properties of the elements of 5d series of the transition elements.

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