The ionic radii of metals are usually?

A. greater than their atomic radii
B. unaffected by the charge on the ion
C. the same as their atomic radii
D. less than their atomic radii

Correct Answer:

Option D – less than their atomic radii

Explanation

In a neutral atom, the atomic and ionic radius is the same, but many elements exist as anions or cations. If the atom loses its outermost electron (positively charged or cation), the ionic radius is smaller than the atomic radius because the atom loses an electron energy shell.

Yes, ionic radius is only less than the atomic radius for a metal.