The correct answer is "Lithium".
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Lithium is a metallic chemical element which is number 3 on the elemental chart. It is a soft metal, silver-white in color. Lithium is placed in group 1 of the periodic table, in the alkali metals group. With high heat, it is used in some cooling systems for nuclear reactors. It is a very corrosive element and is prepared through electrolysis of fused lithium chloride. Lithium will not react with water as strongly as sodium. A brilliant white flame is seen when burned in combination with air. If added into small portions of magnesium, aluminum or lead-base alloys, it can be used to remove gas in steel, copper and iron refining.
Lithium can form numerous organic compounds, including lithium stearate, which is produced by cooking tallow or other animal fat, with lithium hydroxide. The lithium stearate is used to change oil into a lithium-base lubricating grease which is used extensively in the automotive industry. Special glasses and ceramic glazes are made from this same chemical compound. Lithium chloride and bromide help in the brazing and welding industry and used in air conditioning systems due to the moisture retaining property.
Electronic vacuum tubes use lithium to draw in small amounts of oxygen and nitrogen. Trace amounts of lithium and various compounds create a flame that is bright red which has some use in pyrotechnics. Lithium is a salt form that has recently come into use as one medical treatment for bipolar disorder. It is widely found in nature. It’s in plants, animals and even in the human body. The sun also houses lithium.
Mining ore allows for profit by extracting lithium from the hard ore. A few of the commercially key minerals are lepidolite, petalite, spodumene and amblygonite. Lithium is also located in brines such as the brines found in Searles Lake, California, and Great Salt Lake, utah.