Question

The order in which the atomic radius increases is as follows

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

The atomic $\&$ ionic radii of group 13 elements are smaller than the corresponding elements of group 1 and 2 in the same period. This is due to increase in effective nuclear charge $\&$ electrons are pulled inwards resulting in a decrease in atomic size.