For 10 points, name this alkaline earth metal found it milk that is an important structural element in teeth and bones.
Along with sodium carbonate, this element's chloride is produced by the Solvay process. Ions of this element, important in muscle contraction, are found in the sarcoplasmic reticulum. Its electron configuration is argon four S two. A crystalline form of its carbonate is called limestone. For 10 points, name this alkaline earth metal found it milk that is an important structural element in teeth and bones.
Along with sodium carbonate, this element's chloride is produced by the Solvay process.
{calcium} [or {Ca}]