Name two elements that you would expect to have properties very much like those of calcium

Atoms in the same group (column) of the periodic table have similar properties. This is because all elements in the same group have the same amount of valence (outer) electrons.

So, any element directly above or below Calcium on the periodic table would have similar properties.

These would be Magnesium, Barium, Strontium, Radium, and Beryllium.

You know how the first one if filled up like the objects do the same but with the other categories