Calcium Pellet Evaporation Material (Ca)

Calcium is a chemical element with the symbol Ca and atomic number 20. An alkaline earth metal, calcium is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologs, strontium and barium. It is the fifth most abundant element in earth's crust and the third most abundant metal, after iron and aluminum. The most familiar calcium compound on earth is calcium carbonate, found in limestone and the fossilized remnants of early sea life. Gypsum, anhydrite, fluorite, and apatite are also sources of calcium.