The chemical properties of calcium most similairto the chemical properties of

The chemical properties that the element of calcium would have is most similar to any other metal also found in group 2 of the periodic table. This is primarily because due to the same number of valence electrons that the atoms of the group have, and thus the similar chemicals properties and reactivities of those metal atoms.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Sorry i dont understand the question can you rephase it?