What is the identity of the metal cation Ca2 Sr2 Ba2?

The metal cations Ca²⁺ (calcium), Sr²⁺ (strontium), and Ba²⁺ (barium) belong to the alkaline earth metals group in the Periodic Table. They are all divalent cations, meaning they each have a +2 charge. Calcium is found in period 4, strontium in period 5, and barium in period 6. These metals are known for their reactivity, particularly with water and halogens, and are commonly found in various compounds.