Si
Silicon
Objects containing silicon:
-Silicon is the principal component of glass, cement, ceramics, most semiconductor devices, and silicones, a plastic substance.
-Without silicon, the material that microprocessors and memory chips are made, there would be no inexpensive computers, and telecommunications would be less powerful and more expensive.
-Silicon is a major ingredient in bricks
-Silicon is an important ingredient in steel
-Silicon is a refractory material used in making enamels and pottery. A colloidal dispersion of silicon in water is used as a coating agent and as an ingredient for certain enamels.
-Silicon dioxide is used as raw material to make elemental silicon and silicon carbide
-Forms compounds like Silicon carbide (SiC) which is nearly as hard as diamond and is used as an abrasive
-Sodium silicate, also known as water glass, is used in the production of soaps, adhesives and as an egg preservative
-Silicon tetrachloride is used to create smoke screens
Interesting Information about Silicon:
-Discovered by Jons Jakob Berzelius in 1824 in Sweden
-Over 90% of the Earth's crust is composed of silicate minerals, making silicon the second most abundant electropositive element in the Earth's crust after oxygen
-It is a metalloid with a marked metallic luster and is very brittle
-Its melting point is 1687 K
-Its boiling point is 3538 K
-Is found in minerals such asasbestos, feldspar, clay, granite, quartz, and mica
-Is the eighth most abundant element in the Universe
-Expands when frozen
-Is solid at room teperature
Atomic Number:
-The atomic number of an element is the number of protons in an atom
-Silicon's atomic number is 14
Atomic Mass:
-The mass number of an atom is the number of protons plus the number of neutrons
-Silicon's average atomic mass is 28.0855
Sources:
http://www.lenntech.com/periodic/elements/si.htm
http://en.wikipedia.org/wiki/Silicon#Production
http://www.softmachines.org/wordpress/?p=261
http://www.webelements.com/silicon/
http://www.chemicool.com/elements/silicon.html