Name :  Silicon
Symbol :  Si
Atomic Number :  14
Atomic Weight :  28.0855
Specific Heat :  0.71 J/gK
Melting Point :  1410°C
Vaporization :  384.220 kJ/mol
Boiling Point :  3265°C
Electronegativity :  1.8
Density@293 K :  2.33 g/cm³
Discovered :  Jöns Berzelius, Sweden, 1824
Description :  Amorphous form is brown power crystalline form has gray metallic appearance. Seventh most abundant element in the universe. Second most plentiful element in the earths crust.
Uses :  Used in glass as silicon dioxide (SiO2). Silicon carbide (SiC) is one of the hardest substances known and used in polishing. Also the crystalline form is used in semiconductors.