The magnesium is the chemical element of symbol Mg and atomic number 12. The atomic mass is of 24.31. It is the seven element in abundance constituting of the order of 2 % of the terrestrial bark and three more abundant dissolve in the water of sea. The ion magnesium is essential for all the alive cells. The pure metal is not find in the nature. Once produced from of the salts of magnesium, this alkaline-terrestrial metal is use as a element of alloy.
The potassium is a chemical element of the periodic table which symbol is K (of the Latin Kalium) and which atomic number is 19. It is an alkaline metal, white-silver what abound in the nature, in the elements related to the salt water and other minerals. It oxidi rapid in the air, is very a reagent, specially in water, and looks chemical the sodium. It is a chemical element essential.
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