Germanium

ElementGermaniumSymbolGe
Atomic Number32Molar Mass72.59 gmol-1
Electron Configuration[Ar]3d104s24p2Normal Statesolid metalloid
Density @STP5.32 g cm-3Melting Point938oC
Boiling Point2833oCStable Isotopes70Ge, 72Ge, 73Ge, 74Ge, 76Ge
Atomic Radius122 pmIonic Radius90 (2+) pm
Electronegativity (Pauling)2.01Ionization Energy (1st)762 kJ mol-1
Ionization Energy (2nd)1537 kJ mol-1Ionization Energy (3rd)3302 kJ mol-1
Molar Heat Capacity23.3 J K-1mol-1Standard Molar Entropy31.1 J K-1mol-1
Enthalpy of Fusion34.7 kJ mol-1Enthalpy of Vapourization334.3 kJ mol-1
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