Calcium
Calcium is a chemical element; it has 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 fossils of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium. The name comes from Latin calx "lime", which was obtained from heating limestone.
Some calcium compounds were known to the ancients, though their chemistry was unknown until the seventeenth century. Pure calcium was isolated in 1808 via electrolysis of its oxide by Humphry Davy, who named the element. Calcium compounds are widely used in many industries: in foods and pharmaceuticals for calcium supplementation, in the paper industry as bleaches, as components in cement and electrical insulators, and in the manufacture of soaps. On the other hand, the metal in pure form has few applications due to its high reactivity; still, in small quantities it is often used as an alloying component in steelmaking, and sometimes, as a calcium–lead alloy, in making automotive batteries.
Calcium is the most abundant metal and the fifth-most abundant element in the human body. As electrolytes, calcium ions (Ca2+) play a vital role in the physiological and biochemical processes of organisms and cells: in signal transduction pathways where they act as a second messenger; in neurotransmitter release from neurons; in contraction of all muscle cell types; as cofactors in many enzymes; and in fertilization. Calcium ions outside cells are important for maintaining the potential difference across excitable cell membranes, protein synthesis, and bone formation.
DOA Remix EP
- 2023-10-13T00:00:00.000000Z
DOA EP
- 2023-08-04T00:00:00.000000Z
Emperors
- 2025-06-18T00:00:00.000000Z
LIGHTS OUT
- 2025-05-23T00:00:00.000000Z
Chillin'
- 2025-04-16T00:00:00.000000Z
Dead Instinct
- 2025-04-11T00:00:00.000000Z
STYLEZ
- 2025-02-14T00:00:00.000000Z
Hypnotic Cycle
- 2024-06-14T00:00:00.000000Z
Dome Shot
- 2024-04-26T00:00:00.000000Z
Gutter
- 2024-02-23T00:00:00.000000Z
Skelebus
- 2023-12-08T00:00:00.000000Z
Half N Half
- 2023-07-14T00:00:00.000000Z
Control
- 2023-06-23T00:00:00.000000Z
Bullet Rain
- 2023-03-03T00:00:00.000000Z
Restraint
- 2022-10-21T00:00:00.000000Z
Degrader EP
- 2022-03-04T00:00:00.000000Z
Let You Know
- 2021-10-08T00:00:00.000000Z
Adaptation
- 2021-07-09T00:00:00.000000Z
Deep Streets
- 2021-06-11T00:00:00.000000Z
Dissolve EP
- 2021-04-09T00:00:00.000000Z
Similar Artists