The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :

Options

A. decrease in atomic radii and increase in ionic radii
B. decrease in both atomic and ionic radii
C. increase in both atomic and ionic radii
D. increase in atomic radii and decrease in ionic radii

Answer

B

Explanation

As a result of Lanthanoid contraction, we observe decrease in size of both atom and ion.