Kalciums
Kalciums, commonly known as calcium, is a chemical element with the symbol Ca and atomic number 20. It is a soft, gray, and alkaline earth metal that is essential for various biological and geological processes. Calcium is the fifth most abundant element in the Earth's crust and predominantly exists in mineral form, particularly as calcium carbonate, calcium sulfate, and calcium phosphate.
In biological systems, calcium plays a crucial role in maintaining structural integrity and facilitating physiological functions.
Calcium can be obtained through dietary sources such as dairy products, leafy greens, nuts, and fish. Deficiency
Industrially, calcium is used in the production of cement, plaster, and as a reducing agent in metallurgy.
The element was discovered in 1808 by Sir Humphry Davy through the electrolysis of limestone (calcium carbonate).
Calcium’s chemical reactivity increases upon heating, and it readily forms compounds with oxygen, halogens, and other