Question

why atomic and ionic radii of group 13 element are smaller than element of group 2​

Answer 1

Explanation:

The atomic and ionic radii of group 13 elements are smaller than those of the corresponding elements of group 2. Reason: On moving from left to right i.e. group 2 to group 13 ,the nuclear charge increases while the new electrons enter the same shell. Further the electrons in the same shell do not screen each other.

Answer 2

Answer:

Firstly they have more electrons in their outermost shell and thus the effective nuclear charge is more so the nucleus pulls the outermost shell with much force and because of which the distance between the nucleus and the last shell decreases.

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