In any transition series, from left to right, the d-orbitals are progressively filled and their properties vary accordingly.
Q. Which element do you expect to have the smallest atomic radius?

Options

A. La
B. Zn
C. Sc
D. Hg

Answer

b

Explanation

Atomic size decreases along the transition series from left to right through at the end of the series, there is a slight increase. Down the group, the size increases though elements of the second and third series have nearly the same size due to lanthanide contraction.