Calcium

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by Crishelle
Last updated 7 years ago

Discipline:
Science
Subject:
Chemistry
Grade:
9

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Calcium

CALCIUM

Technical Info:Name: CalciumAtomic Symbol: Ca Atomic Number: 20Atomic Mass: 40.08Group: 2(Alkaline earth metals)Period: 2Classification: MetalBlock: SElectron Configuration: [Ar]4s2Physical Properties:Melting Point: 842 °CBoiling Point: 1484 °CPhase at room temparature: SolidColour: Dull gray, SilverDensity(near r.t.): 1.55 g·cm−3 Liquid density at m.p.:1.378 g·cm−3

History:Calcium, a metallic element, is fifth in abundance in the earth's crust, of which it forms more than 3%. From the Latin word calx, lime. Though lime was prepared by the Romans in the first century under the name calx, the metal was not discovered until 1808. After learning that Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, Humphry Davy was able to isolate the impure metal.

B-R Diagram:

CALCIUM:

Manufacture:It is an essential constituent of leaves, bones, teeth, and shells. Never found in nature uncombined, it occurs abundantly as limestone, gypsum, and fluorite. Apatite is the fluorophosphate or chlorophosphate of calcium.

USES:

1. Calcium is used as a reducing agent in other metals such as Thorium, Uranium, Zirconium, etc.,2. It is used as Deoxidizer, Desulfurizer or Decarbunizer for various ferrous & nonferrous alloys.3. It is also used as an alloying agent for Aluminium. Beryllium, Copper , Lead, & Magnesium alloys, and serves as a "getter" for natural gases in vacuum tubes and other suction devices.

Chemical Properties:Flammability: It will ignites when heated in air or oxygen.Reactivity w/ water: It rapidly reacts with cold water at first but it slows due to forming of Calcium hydroxide.Highly reactive w/ acids: Highly reactiveOxidation: Used as deoxidizer in steel.Compounds: includes limestones,gypsum, and marble

Submitted to: Mr. McCormackSubmitted by: Crishelle Ladignon


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