What is magnesium? Detailed answer

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What is magnesium? Detailed answer

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What is magnesium?

Magnesium is one of the most amazing metals known to man. It is so light that its weight is only two-thirds that of aluminum. Magnesium is the lightest metal used in industry. In addition to its light weight, magnesium has another unusual quality. It can burn. Magnesium filings or small shavings ignite very easily and burn violently.

On the other hand, the properties of magnesium do not differ from those of other metals. It has a silvery white luster, is slightly stronger than aluminum, and corrodes or wears quickly in damp air. To increase its strength, hardness, and corrosion resistance, magnesium is often alloyed with zinc, manganese, and aluminum.

Magnesium alloys are widely used. Sheets, plates, pipes, beams and wire are made from them. The extreme lightness of magnesium makes it particularly useful in the manufacture of aircraft and other fast moving vehicles. Sometimes the metal in its pure form, due to its ability to burn, is used in rockets, fireworks, and tracer bullets. Magnesium salts are used in medicine and chemistry. Bitter salt is magnesium sulfate, and milk of magnesia is a suspension of magnesium oxide. At one time, magnesium was just fun in chemistry labs.

In 1808, Sir Humphrey Davy was able to identify some of its qualities, although he was unable to obtain pure magnesium. Gradually, scientists began to work with this strange metal and learned how to obtain it in its pure form and how to use it in an alloy with other metals. It took almost a hundred years to get the first magnesium alloy. Magnesium has such a high chemical activity that it does not occur in the free state in nature. But in combination with other elements, it forms more than two percent of the earth's crust.

Magnesium is obtained by separating it from other minerals with which it occurs naturally. This is mainly magnesite, dolomite, carnallite, natural salt solutions.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Did libraries exist in ancient times?

A library is an attempt to bring together everything written by a person. The first efforts in this direction were made long before the birth of Christ.

Scientists who excavated Ur, the city of the patriarch Abraham, discovered clay tablets with inscriptions. They date back to 800 BC. e. and can be considered the first library. In 600 BC. e. the Mesopotamians had well-organized libraries in their temples and palaces. The "books" in them were clay tablets. Thousands of such tablets have been collected by theme in temples and palaces. These collections were the first true libraries.

The Egyptians also had libraries. They were created in temples, priests took care of them. The books were in the form of rolls made from papyrus.

But the most famous library of ancient times was assembled in Alexandria, Egypt. It was formed in 300 BC. e. These were the first attempts to collect all Greek literature. It contained at least 700 papyrus scrolls, which were cataloged and completely organized - just like in modern libraries. The Romans were not interested in libraries at first. But the Greeks inspired them and they created a system of public libraries. The wealthy citizens of Rome founded libraries for the people and amassed large collections for themselves. Many of these early Roman libraries were located in forum sites and public baths.

In the 28th century there were 1850 public libraries in Rome. Most of them were destroyed by fires, robberies, from dampness, or were destroyed when the Roman Empire was attacked by barbarians from the North. Public libraries in the modern version appeared in the XNUMXth century in England. In XNUMX, the British Parliament authorized the opening of public libraries. Today, of course, we see public libraries as the backbone of civilization.

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