Gallium in the environment. Uses of Gallium. This is approximately 0.63 moles. Gallium is a chemical element with the symbol Ga and atomic number 31. Gallium does not react with water and air at room temperature due to the formation of a surface layer of oxide. Gallium is a liquid at 30°C, so one would expect it to become a solid at 29.7°C. ... much like how a bar of soap gets all deformed and puffy if left in a bowl of water. Reaction of gallium with air Reaction of gallium with water Reaction of gallium with the halogens Reaction of gallium with acids Reaction of gallium with bases. Gallium's boiling point is about 2,400°C (4,400°F) and its density is 5.9037 grams per cubic centimeter. $\endgroup$ – Gowtham Apr 29 '15 at 15:56 But here, the penetration seems to be only $12 \mu m$. Chemistry. Gallium liquid clings to or wets glass and similar surfaces. Gallium does not exist in pure form in nature, and gallium compounds are not a primary source of extraction. However, at higher temperatures, gallium reacts with air to form gallium oxide. Gallium is widely used in electronic industry. Low melting gallium alloys are used in some medical thermometers as non-toxic substitutes for mercury. Does gallium dissolve gold? According to the periodic table, the mass of one mole of gallium is 69.723 grams. Gallium is only superficially oxidised when heated, even to redness, in air or oxygen. According to the coefficients in the balanced equation, four moles of gallium react with three moles of oxygen to produce two moles of gallium oxide. Four other elements expand when they freeze; silicon, bismuth, antimony and germanium. Significance and Uses. I probably think under no stress conditions, 316 is resistant to Gallium due to passivation. For gallium, n = 43.9 ÷ 69.723. It's because of the structure of all metals that liquid and solid metals interact like this. Gallium also has the unusual property that (like water) it expands as it freezes. 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