So here for this example question, it says which of the following statements is false. All right, so the cation has a smaller ionic radius than the calcium atom. Remember atom means it's neutral. Calcium is in Group two way, so its charge is 2. Plus remember we said earlier that cations lose electrons which causes a decrease for the ionic radius of the positive ion. So yeah, since calcium is a positive ion, it will in fact have a smaller ionic radius than the neutral form. So this is true.

Sulfide ion has a larger ionic radius than these sulfur atom. Sulfide I'd means it's an anion, It's gained electrons. Remember we said that anions are larger than their neutral form because more electrons equals larger ionic radius. So this is true. The cadmium ion has a larger ionic radius than the cadmium atom. So cadmium has a charge of two. Plus remember cations are smaller than their neutral form because they have less electrons. So this is false and our answer?

Bromide ion. I mean it's a negative charge, it's an anion. Anions are larger than their neutral forms because again, more electrons equals larger ionic radius O. The only statement here that's false would have to be option C.