Answer
Atomic radii of main group elements decreases as we move to the right; on the other hand, atomic radii of transition elements remain the same.
Work Step by Step
In main group elements, as we move to the right, the effective nuclear charge experienced by the outermost electrons increases, resulting in a smaller atomic radius. However, in transition elements, when we move to the right, effective nuclear charge remains the same, so no significant change in atomic radii is observed.
