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Gallium  SEE PERIODIC TABLE
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Atomic Number31

Atomic SymbolGa

Atomic Weight69.723 amu

GroupOther Metal, 13

FormSolid

Density @ STP5.91 g/cm3

Melting Point29.76 °C (85.566 °F, 302.91 °K)

Boiling Point2204 °C (3999.2 °F, 2477.15 °K)

Heat of Fusion5.59 kJ/mol

Heat of Vaporization254 kJ/mol

First Ionization Potential5.99930 eV

Electronegativity (on Pauling scale)1.81

Specific Heat Capacity0.371 J/g K

Ground State Electron Configuration4s2 4p1

Oxidation States+3

Stable Isotopes and Natural Abundance on Earth69Ga, 60.109%; 71Ga, 39.892%

Selected Radioisotopes64Ga, 67Ga, 68Ga

Atomic Radius136 pm

Crystal StructureOrthorhombic

Discovered byLecoq de Boisbaudran, 1875

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