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jacob osborne

on 12 March 2010

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Transcript of Cobalt

General Knowledge
Cobalt is one of the three magnetic metals.

Cobalt is frequently found in meteorites.

Cobalt is hard and brittle.

It has a lustrous, metallic gray coloring.
Cobalt’s atomic number is 27 so it has 27 electrons and protons.

It’s symbol is Co and it’s atomic weight is 58.933195

Cobalt has 32 neutrons.
On The Table
Cobalt is in column 8B along with osmium, rhodium, and the other magnetic metals.
Other facts
Cobalt is naturally a solid but melts at 2723.0 °F and boils at 5198.0 °F .

Cobalt is a transition metal like gold silver copper zinc and other common metals.

Cobalt was discovered in 1737 by George Brandt.

Cobalt comes from the German word kobold meaning evil spirit.

Cobalt is used in ceramics, and magnets.
Cobalt has 2 electrons in the first level, 8 in the next, 15 in the third, and 2 in the outer shell.
Cobalt has eight isotopes.
Co-56 Half Life: 77.3 days

Co-57 Half Life: 271.8 days

Co-58 Half Life: 70.9 days

Co-58m Half Life: 9.1 hours

Co-59 Half Life: Stable

Co-60 Half Life: 5.3 years

Co-60m Half Life: 10.5 minutes

Co-61 Half Life: 1.7 hours
Some Compounds with cobalt include:

Cobalt difluoride: CoF2
Cobalt trifluoride: CoF3
Cobalt tetrafluoride: CoF4
Cobalt dichloride: CoCl2
Cobalt trichloride: CoCl3
Cobalt dichloride dihydrate:CoCl2.2H2O
Cobalt dibromide: CoBr2, Cobalt diiodide: CoI2
Cobalt oxide: CoO
Decorate trioxide: Co2O3
Tricobalt tetraoxide: Co3O4
Cobalt sulphide: CoS
Cobalt persulphide: CoS2
Dicobalt trisulphide: Co2S3
Cobalt selenide: CoSe
Cobalt telluride: CoTe
Dicobalt octacarbonyl: Co2(CO)8
Tetracobalt dodecacarbonyl: Co4(CO)12
Hexacobalt hexadecacarbonyl: Co6(CO)16
Tricobalt diphosphate octahydrate: Co3(PO4)2.8H2O
Cobalt nitrate hexahydrate: Co(NO3)2.6H2O
Hexaaquocobalt dichloride: CoCl2.6H2O
Tetraquocobalt difluoride: CoF2.4H2O
Cobalt dibromide hexahydrate: CoBr2.6H2O
Cobalt sulphate heptahydrate: CoSO4.7H2O.
Works Cited

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