because they are all alkaline earth metals and occur naturally in nature.
calcium
Barium.
These metals are beryllium, magnesium, calcium, strontium, and barium.
Strontium is chemically very similar to Calcium. The human body will readily use Strontium as bone-making material, but Strontium does not satisfy the other uses the human body has for Calcium e.g. regulating calcium content in blood, etc.
Because of your mom
Calcium shares properties with Magnesium and Strontium.
The chemical properties of calcium are most similar to (in between) the chemical properties of magnesium and strontium.
calcium
Strontium and magnesium
Six elements are there. And they are: beryllium, magnesium, calcium, strontium, barium, radium
Magnesium with two electronic shells.
Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium all have an oxidation state of plus 2.
Group 2 elements or alkaline earth metals are beryllium, magnesium, calcium, strontium, barium and radium
Beryllium (Be) apexvs
Barium.
I don't see any elements listed... but the elements that are most similar to calcium in behavior would be those directly above or below it; Mg (Magnesium) and Sr (Strontium).
Beryllium, Magnesium, Calcium, Strontium, Barium and Radium.