A) The atomic radii of elements in group Y are smaller than the corresponding ionic radii for each element. Explain. b) State the general name given to elements

For elements K, L, and M in Group Y, the ionic radius is larger than the atomic radius.

This indicates that elements in Group Y gain electrons to form anions. When an atom gains electrons, the increased electron-electron repulsion and the decreased effective nuclear charge per electron cause the electron cloud to expand, resulting in a larger ionic radius compared to its atomic radius.