This role of calcium in blood clotting pdf a good article. Follow the link for more information. This article is about the metallic element.
Its compounds were known to the ancients, though their chemistry was unknown until the seventeenth century. Calcium compounds on the other hand are very widely used in many industries: for example, they are used in foods and pharmaceuticals for calcium supplementation, in the paper industry as bleaches, in cement, in the manufacture of soaps, and as electrical insulators. Calcium is the fifth most abundant element in the human body and the most abundant metal. This classification is mostly obsolete in English-language sources, but is still used in other countries such as Japan. As a result, comparisons with strontium and barium are more germane to calcium chemistry than comparisons with magnesium. C, higher than its adjacent group 2 metals do.
Although it is infeasible for terrestrial applications as it reacts quickly with atmospheric oxygen, its use as a conductor in space has been considered. The chemistry of calcium is that of a typical heavy alkaline earth metal. When finely divided, it spontaneously burns in air to produce the nitride. All four dihalides of calcium are known. Ca, which makes up 96. Ca to capture a neutron.
Ca are the first “classically stable” nuclides with a six-neutron or eight-neutron excess respectively. 20 protons and 28 neutrons arranged in closed shells. Sc are available for decay as well, they are also forbidden due to their high spins. Calcium is the only element to have two primordial doubly magic isotopes.
Like other elements, a variety of processes alter the relative abundance of calcium isotopes. Lighter isotopes are preferentially incorporated into these minerals, leaving the surrounding solution enriched in heavier isotopes at a magnitude of roughly 0. Calcium compounds were known for millennia, although their chemical makeup was not understood until the 17th century. We are probably only acquainted as yet with a part of the metallic substances existing in nature, as all those which have a stronger affinity to oxygen than carbon possesses, are incapable, hitherto, of being reduced to a metallic state, and consequently, being only presented to our observation under the form of oxyds, are confounded with earths. It is even possible that all the substances we call earths may be only metallic oxyds, irreducible by any hitherto known process. However, pure calcium cannot be prepared in bulk by this method and a workable commercial process for its production was not found until over a century later. In the United States and Canada, calcium is instead produced by reducing lime with aluminium metal at high temperatures.