Which element has a larger ionic radius than calcium (Ca)?The Periodic TableA.Sodium (Na)B.Magnesium (Mg)C.Potassium (K)D.Gallium (Ga)

The element with a larger ionic radius than calcium (Ca) is Potassium (K).

Here's why:

The ionic radius tends to increase as you move down a group (column) on the periodic table. This is because with each row you go down, you're adding another energy level to the atom, which increases the distance between the nucleus and the valence electrons, thus increasing the size of the ion.

Potassium (K) is below calcium (Ca) on the periodic table, so it has a larger ionic radius. Sodium (Na) and Magnesium (Mg) are above calcium (Ca) on the periodic table, so they have smaller ionic radii. Gallium (Ga) is in a different group and period from calcium (Ca), so it's not directly comparable in the same way.