Question

In any transition series, as we move from left to right the $d$-orbitals are progressively filled and their properties vary accordingly.

Which element do you expect to have the smallest atomic radius?

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

Answer 1

The correct option is B $Zn$

The atomic radius decreases as we move from left to right because of the increased nuclear charge. The atomic radius decreases as we move down because new shell are added up. Hence $Zn$ is expected to have the least radius in the transition elements.