Atomic Number14Molar Mass28.09 gmol-1
Electron Configuration[Ne]3s23p2Normal Statesolid metaloid
Density @STP2.33 g cm-3Melting Point1414oC
Boiling Point3265oCStable Isotopes28Si, 29Si, 30Si
Atomic Radius118 pmIonic Radius26 (4+) pm
Electronegativity (Pauling)1.9Ionization Energy (1st)787 kJ mol-1
Ionization Energy (2nd)1577 kJ mol-1Ionization Energy (3rd)3231 kJ mol-1
Molar Heat Capacity20 J K-1mol-1Standard Molar Entropy18.8 J K-1mol-1
Enthalpy of Fusion39.6 kJ mol-1Enthalpy of Vapourization383.3 kJ mol-1
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