History of magnesium. Physical and mechanical properties.
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History
The history of the discovery of magnesium is associated with the mineral waters in England from which the salt was isolated, with a bitter taste. Apothecaries called it bitter salt, and determine that it consists of the sulfuric acid salt of an unknown element. The Latin name of the element was given from the name of the ancient city of Magnesia, in the vicinity of which there are especially many deposits of magnesite mineral. In 1829 French chemists obtained magnesium, restoring it to molten KCl. The next step to industrial production was made by Michael Faraday. In 1830, he first received this metal from molten MgCl 2 .
Physical properties
| Chemical symbol | Mg |
| Specific gravity of Mg | 1.738 g / cm³ |
| Melting temperature | 650 ° C |
| Boiling temperature | 1090 ° C |
| Specific heat of fusion | 9.20 kJ / mol |
| Specific heat of evaporation | 131.8 kJ / mol |
| Degree of oxidation | +2 |
Biological role
Most adults experience magnesium deficiency. The lack of this element is manifested by chronic fatigue, insomnia, osteoporosis and arthritis, headaches, muscle cramps. When sweating, frequent use of beer, laxatives and diuretics, after stress, as well as people of physical labor and athletes) the need for magnesium increases.
Delivery, price
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