Density
5.91 g/cm³ (at 29.6 °C)
Discovery
Discovered by Paul Émile Lecoq de Boisbaudran in 1878.
Common Uses
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Used in some light-emitting diodes (LEDs)
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Applications in high-temperature thermometers
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Used in solar cells and semiconductor materials
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Component in some electronic circuits
Interesting Facts
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Gallium has a relatively low melting point and can melt in your hand.
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It expands by 3.1% when it solidifies.
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Pure gallium is a silvery-blue metal.
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Its existence was predicted by Dmitri Mendeleev in 1869, who called it "eka-aluminum".
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