Calcium Calcium Calcium is a chemical element with symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust and the third most abundant metal, after iron and aluminium. The most common calcium compound on Earth is calcium carbonate, found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium. The
European Calcium Society Heizmann has sponsored the publication of significant articles in the scientific journal Biochimica et Biophysica Acta. A newsletter is also produced twice a year (May and November). In 2007, ECS launched its first workshop, in Ariège (France). The second took place in June 2009 in Smolenice (Slovakia). European Calcium Society The European Calcium Society is a non-profit society that aims to develop relationships between different generations of scientists in Europe working in the field of calcium signaling and the proteins involved in the Calcium Toolkit. The First European Symposium took place in 1989 and covered calcium binding proteins in normal