Calcium

Calcium is a type of substance found in nature. It is represented by the symbol Ca and has the number 20. It belongs to a group of metals called alkaline earth metals. Calcium reacts easily and forms a dark layer when it mixes with air. It shares many properties with two other substances, strontium and barium.

Calcium Element Data

Group	2	Melting point	842°C, 1548°F, 1115 K
Period	4	Boiling point	1484°C, 2703°F, 1757 K
Block	s	Density (g cm−3)	1.54
Atomic number	20	Relative atomic mass	40.078
State at 20°C	Solid	Key isotopes	⁴⁰Ca
Electron configuration	[Ar]4s²	CAS number	7440-70-2
ChemSpider ID	4573905	ChemSpider is a free chemical structure database

Also Check: Osmosis | Silver | Corrosion

Related Links: Fluorine | Isomerism | Iodine

Uses of Calcium:

Calcium is essential for strong bones and teeth.
It helps muscles move by carrying messages from the brain throughout the body.
Calcium ions help cells communicate in multicellular organisms.
It aids in releasing hormones and enzymes.
Calcium is crucial in steelmaking and is used because it easily combines with oxygen and sulfur.
Many calcium compounds are used in food additives and medicines.

Properties of Calcium:

Calcium is the fifth most abundant metal in the Earth's crust (4.1%).
Important calcium isotopes include 48Ca, 46Ca, 44Ca, 43Ca, 42Ca, and 40Ca.
It is found in large amounts as gypsum (calcium sulfate), limestone (calcium carbonate), apatite (calcium phosphate), and fluorite (calcium fluoride).
Calcium bicarbonate in hard water can cause deposits.

Interesting Facts About Calcium:

Humans have known about calcium and its compounds since ancient times, known to Greeks and Romans.
The Romans used lime (calcium oxide) in their concrete, calling it "Calx."
In 1808, Davy was the first to isolate pure calcium.
Once refined, calcium becomes a harder, silver-colored metal.

Frequently Asked Questions

Calcium is a chemical element found in nature.

The chemical formula of calcium is Ca.

Calcium reacts with water, forms oxides, burns with a bright flame, and reacts with acids.

Calcium is used in bones and teeth, in construction materials like cement, for making metal alloys, in fertilizers, and in medicine.

Pure calcium is a shiny, silvery-white metal that is soft and reacts with air and water.

Calcium is a chemical element with the symbol Ca and atomic number 20.

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