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Gallium Ga
Where is gallium used--or where does it impact our everyday lives?
Gallium is an amazing metal in that it melts about our body temerture. So holding some in our hands causes the gallium to change from the solid to the liquid state. So unlike a metal!
Gallium symbol: Ga
Atomic number: 31 Atomic Mass: 69.72
Position on the periodic table: Group 13, Period 4.
Melting point: 29.76°C (85.58 oF)
Boiling point: 2,205oC (4,001 oF)
Reaction with O2 : 4Ga + 3O2--> 2Ga2O3
Reaction with water: no reaction
Electron configuration: [Ar] 3d10, 4s2 4p1
Source: LANL.gov Researcher Patrick H
Compounds of gallium with semimetals such as arsenic allow gallium to be used in LEDs, light-emitting diodes. See a video of the red LED during a Chemistry One lab investigating the properties of metals, non-metals and metalloids. The Tester for electrical conductivity has a green and red LED. The sample of silicon in the movie lights the diodes in the tester confirming the electrical conductivity of the metalloid silicon.
See the VIDEO of the use of red LEDs with aluminum gallium arsenide, AlGaAs, and aluminum gallium indium phosphide (AlGaInP) and another video incuding testing magnesium and silicon for electrical conductivity
Orange LED lights can be made of aluminium gallium indium phoshide
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Red and green LEDs--light emitting diodes--testing the conductivity of copper in the Chemistry One Metal, Non-metal, Metalloid lab.
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Synthetic garnets are often yttrium aluminium garnet Y3Al2(AlO4)3,
Other similar compounds have a formula A3B2(C O4)3. where A, B and C are different elements with silicon, Si, gemanium, Ge, gallium, Ga, aluminium, Al, vanadium. V or iron Fe with the O4.
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Gallium was discovered spectroscopically, where light is split into characteriastic wavelengths. Here Chemistry One students are studying the spectra of lights and elements.
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Solar panels can use semiconductors like gallium arsenide to transfer light energy into electrical energy. This house on has solar panels on the roof, spotted by both Chem teachers old Ms.H and young Ms H on a field trip.
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