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Si - Silicon Silicon is the quintesential metalloid. Pure silicon is used for electronic devices, but the oxide and silicate minerals comprise more than a quarter of the earth's crust. Jöns Berzelius isolated silicon in 1823 in Stockholm by potassium fusion of quartz.
Atomic number - 14 Density g/mL 2 .33
Atomic weight u 28 .0855 Melting point K 1685
Bonding radius A 1 .11 Boiling point K 3540
Atomic radius A 1 .46 Heat of vaporization kJ/mol 384 .22
Ionization Potential V 8 .151 Heat of fusion kJ/mol 50 .55
Electronegativity - 1 .9 Specific heat J/gK 0 .71
The oxide is amphoteric.
Crystal are face centered cubic.
Electron config. : [Ne] 3s2 3p2
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