Silicon

• Atomic Number is 14• Symbol is Si• Atomic Mass is 28.09

Pure Silicon

Silicon

• Group 14• Carbon Family• Metalloid• Density of 2.33 g/cm3

• Silvery color• Boiling point of 2355oC• Combustible solid when in powder form• Melting point of 1410oC• Hardness of 6.5 Mohs• Solid

Silicon

• Incompatibilities– Chlorine – Fluorine– Oxidizers– Calcium– Cesium Carbide– Alkaline Carbonates

Isotopes

• Si22– 6ms

• Si23– >200ns

• Si24– 102ms

• Si25– 220ms

• Si26– 2.234s

• Si27– 4.16s

• Si28– stable

• Si29– stable

• Si30– stable

Common Compounds

• 1-Vinylpyrrolidone– Formula: (CH3)3-Si-[O-

Si(CH3)2]n-O-Si-(CH3)3

• Calcium Silicate– Formula: CaSiO3

• Ethyl Silicate– Formula: (C2H5)4SiO4

• Methyl Silicate– Formula: (CH3O)4Si

• Silica– Formula: SiO2

• Silicon– Formula: Si

• Silicon Carbide– Formula: C8H10O2S– Formula: SiC

• Silicon Tetrahydride– Formula: SiH4

• Talc– Formula: 3MgO-4SiO2-H2O– Formula: Mg3Si4O10(OH)2

Discovery Of Silicon• Discoverer: Jons Berzelius • Date of Discovery: 1823 • Discovered in Sweden• Stable Life Span• Name Origin: From the Latin word silex (flint) • Uses: glass, semiconductors, computer chips• Obtained From: clay, granite, quartz, sand

Impact

Environmental• No negative environmental

effects have been reported.• It is very sustainable

Social• Used many things people

use everyday• Used in technology• Has a positive social impact

Uses• Chips for computers and

electronics• In engines• Enhances iron’s magnetic

abilities • In concrete and bricks• In watches and clocks• Cookware• Medical implants• Adhesives

Cost• Pure Silicon $5.4 per 100g• Bulk Silicon $0.14 per 100g

Interesting Facts

• The lowest purity electronic grade silicon can be is 99.9999999% pure.

• Second most abundant element on our planet is Silicon.

• 8th most abundant element in the universe is Silicon

• Silicon is made in stars with a mass of eight or more Earth sun