Write The Increasing Order Of Atomic Radii For Group 13 Elements. But there is an exception for group 13 elements and the order is not uniform. Driving tests (india) mass communication and journalism.
However, there is an anomaly observed in the atomic radius of gallium due to the presence of 3d electrons. Hence the correct option is (c) b < ga < al < in < tl. Change in size down the group is much more significant as compared to across the period.