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The name of the element is derived from the Latin. calx (genitive calcis) - «lime", "soft rock". It was suggested by English chemist Humphrey Davy, in 1808 Mark calcium metal by electrolysis. Davy subjected to electrolysis mixture is wet hydrated lime oxide HgO Mercury platinum plate, which was the anode. The cathode was a platinum wire immersed in liquid mercury. As a result of the electrolysis of the calcium amalgam. Driven away from her mercury Davy got metal called calcium.
Calcium compounds - limestone, marble, gypsum (and lime - limestone calcination product) were used in the construction business for several thousands of years ago. Until the end of the XVIII century, chemists believed lime simple body. In 1789, Lavoisier suggested that lime, magnesia, barytes, alumina and silica - a substance complex.
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