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Si
Silicon


Atomic no.:
14
Atom. weight: 28.0855
Density: 2.33
Class:
semi metal
Melting point: 1410°C
Boiling point: 2355°C
Colour: blue grey shiny
   
Discoverer: J.J. Berzelius
Place: Stockholm, Sweden
Year: 1824

Silicon was discovered in 1824 by J.J. Berzelius in Stockholm, Sweden. After carbon, silcon is the most abundant element on earth, the abundance being 277,000 ppm. It is generally present as a silicate, these being found in many rocks, clays and soils. Silicon is obtained by reducing silica (sand, SiO2), with carbon. Further purification of the element for applications requiring high purity material (e.g. semi conductor devices) is achieved by zone refining, the resulting purity being better than 1:109. Silicon exists in two allotropic forms; brown silicon is a powder, whereas crystalline (metallic) silicon is grey and it is the latter which is more widely used. Bulk silicon is unreactive towards oxygen, water, acids (excluding HF), but is soluble in hot alkalis. Silicon has many applications in various industries; for example, ultra high purity silicon is used in the semiconductor industry as a result of its semiconducting properties. Silicon is also used as an alloying element in the manufacture of certain alloys (e.g. ferrosilicon, an alloy of iron and silicon which is used to introduce silicon into steel and cast iron). It is also used in the manufacture of glass.

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 Silicon - high precision density-standard cube 1cm3  Art. Nr. 003787  
Silicon - high precision density-standard cube 1cm3
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Silicon - monocrystalline 99.9999% - High precision density-standard cube 1cm3 NEW! highly shiny polished

Using finest materials, each density cube was lapped to 10x10x10mm by a mechanical engineering company with an accuracy of 0.01 millimeter. Each one separately ground and mirror polished it represents the theoretical density of the respective element by its weight. The weight is not affected by the laser inscription. Information such as element symbol, name and density is durable burned at the surface. Each element even shows its specific characteristis in colour and reaction with the laser. Altogether 25 elements are planned in a complete set in a wooden case.

Amount: 1 St. / 1 pc..
Purity : 99,9999%
Packing: PE - bag
90.00
- tax free

Availability: 3 in stock

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