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Ca (Calcium)

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Keterangan

     Calcium readily forms a coating of oxide and nitride in air, it reacts with water and burns with a yellow-red flame, forming mostly the nitride. Calcium carbonate is soluble in water containing carbon dioxide, and this causes hardness in water. This calcium carbonate is also the constituent of stalactites and stalagmites in caves where water drips slowly and evaporates in situ.

Nama lain (trademark, branding etc.)

Calcium, Vápník, Kalcij, Calcium, Kalzium - r, Calcio, Kalsium, Cálcio, Кальций, Kalcium

Spesifikasi Produk

Overview of Calcium
Atomic Number 20
Group 2
Period 4
Series:  Alkali Earth Metals
Relative Atomic Mass (12C=12.000)  40.078
Boiling Point:  1757K 1484°C 2703°F
Melting Point:  1112K 839°C 1542°F
Density/kg m-3  1550 (293K)
Ground State Electron Configuration  [Ar]4s2
Electron Affinity(M-M-)/kJ mol-1  186
Discoverer:  Sir Humphrey Davy
Discovery Location:  London England
Discovery Year:  1808
Name Origin: Calcium's Name in Other Languages

Aplikasi

     Calcium and its compounds are widely used. Quicklime (calcium oxide), which is made by heating limestone and can be changed into slaked lime by the addition of water, is a substance often used by the chemical industry. It has the advantage of being cheap and readily available. When mixed with sand it takes up carbon dioxide from the air and hardens as mortar and plaster. Calcium from limestone is an important constituent of Portland Cement. Calcium is also used as a reducing agent in preparing other metals such as thorium and uranium, and as an alloying agent for aluminium, beryllium, copper, lead and magnesium alloys.

Bahan Baku

Calcium is the chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the Earth's crust. Calcium is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

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