Ga (Gallium)

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     Gallium reacts with acids and alkalis. It has the longest liquid range of all elements, and can be liquid near room temperatures - it can melt in the hand. It also expands as it freezes, which is unusual for a metal, by 3.1%. Gallium wets glass or porcelain, and forms a brilliant mirror when painted on glass.

Nama lain (trademark, branding etc.)

Gallium, Galij, Gallium - r, Gallio, Gálio, Галий, 

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Overview of Gallium
Atomic Number 31
Group 13
Period 4
Series Metals
Relative Atomic Mass (12C=12.000)  69.723
Boiling Point 2676K 2403°C 4357°F
Melting Point 303.05K 29.9°C 85.8°F
Density/kg m-3  5907 (293K)
Ground State Electron Configuration  [Ar]3d104s24p1
Electron Affinity(M-M-)/kJ mol-1  -36
Discoverer Paul émile Lecoq de Boisbaudran
discovered  Paris France
Discovery Year 1875
Name Origin Latin: Gallia old name of France (Gaule).


     Gallium readily alloys with most metals, and is used especially in low-melting alloys. It has a high boiling point, which makes it ideal for recording temperatures that would vaporise a thermometer. It has found recent use in doping semiconductors and producing solid-state devices such as transistors.

Bahan Baku

Gallium is a chemical element with symbol Ga and atomic number 31. Elemental gallium does not occur in nature, but as the gallium(III) compounds that are in trace amounts in zinc ores and in bauxite. Gallium is a soft silvery metal, and elemental gallium is a brittle solid at low temperatures. If it is held in the human hand long enough, gallium will melt, since it melts at the temperature of about 29.76 °C (85.57 °F) (slightly above room temperature). The melting point of gallium is used as a temperature reference point. The alloy galinstan (68.5% gallium, 21.5% indium, and 10% tin) has the even lower melting point of −19 °C (−2 °F), well below the freezing point of water.

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