Magnesium, Beryllium, and Calcium The lightest metal of all the elements is magnesium. It is the most abundant element in the Earth’s crust. Since it is so abundant, the aerospace industry uses it extensively. Magnesium is not a strong element by itself. Alloys have been developed to improve magnesium’s hardness, resistance against corrosion, and its ability to be welded. These alloys are used in making parts for aircrafts, spacecrafts, rockets, car equipment, portable tools, and household appliances. Magnesium powder burns very well. Magnesium is used in flares, fireworks, and photographic flashbulbs. Magnesium does not occur uncombined, but there are many compounds of magnesium in nature. Many soils and rocks contain compounds of magnesium in nature. Magnesium hydroxide (milk of magnesia) and magnesium sulfate (Epson salt) are well known. Milk of magnesia is....

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