PERIODIC ELEMENT
Si (Silicon)

 



Atomic number : 14
Atomic mass : 28.0855 g.mol-1
Electronegativity according to Pauling : 1.8
Density : 2.33 g.cm-3 at 20 °C
Melting point : 1410 °C
Boiling point : 3265°C
Vanderwaals radius : 0.132 nm
Ionic radius : 0.271 nm (-4) ; 0.041 (+4)
Isotopes : 5
Electronic shell : [Ne] 3s23p2
Energy of first ionisation : 786.3 kJ.mol-1
Energy of second ionisation : 1576.5 kJ.mol-1
Energy of third ionisation : 3228.3 kJ.mol-1
Energy of fourth ionisation : 4354.4 kJ.mol-1
Discovered by : Jons Berzelius in 1823
 
Atomic Structure Uses (glass, semiconductors, Electronic cards )