What is magnesium?

  • (noun): A light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine).
    Synonyms: Mg, atomic number 12


Magnesium is a chemical element with symbol Mg and atomic number 12. Its common oxidation number is +2. It is an alkaline earth metal and the eighth most abundant element in the Earth's crust and ninth in the known universe as a whole. Magnesium is the fourth most common element in the Earth as a whole (behind iron, oxygen and silicon), making up 13% of the planet's mass and a large fraction of the planet's mantle. The relative abundance of magnesium is related to the fact that it is easily built up in supernova stars from a sequential addition of three helium nuclei to carbon (which in turn is made from three helium nuclei). Due to magnesium ion's high solubility in water, it is the third most abundant element dissolved in seawater.

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Some articles on magnesium:

Magnesium Sulfite
... Magnesium sulfite is the magnesium salt of sulfurous acid with the formula MgSO 3 ... When heated above 40 °C (104 °F), it is dehydrated to magnesium sulfite trihydrate, or MgSO 3·3H 2O ...
Magnesium Responsive RNA Element
... The Magnesium responsive RNA element, not to be confused with the completely distinct M-box riboswitch, is a cis-regulatory element that regulates the expression of the ... The mechanism for the potential magnesium-sensing capacity of this RNA is still unclear, though a recent report suggests that the RNA element targets the mgtA ...
Semi-solid Metal Casting - Processes - Thixomolding
... For magnesium alloys, thixomolding uses a machine similar to injection molding ... In a single step process, room temperature magnesium alloy chips are fed into the back end of a heated barrel through a volumetric feeder ... The barrel is maintained under an argon atmosphere to prevent oxidation of the magnesium chips ...
Safety Precautions For Magnesium Metal
... Magnesium metal and its alloys are explosive hazards they are highly flammable in their pure form when molten or in powder or ribbon form ... Burning or molten magnesium metal reacts violently with water ... When working with powdered magnesium, safety glasses with welding eye protection are employed, because the bright white light produced by burning magnesium contains ultraviolet light ...
Low Valent Magnesium Compounds
... Two low valent magnesium compounds have been discovered that are the first examples of stable magnesium(I) compounds ... the ternary metal hydrides Mg2RuH4, Mg3RuH3, and Mg4IrH5 and magnesium diboride, MgB2 with short Mg-Mg bonds (293 pm, 303 pm, 275 pm, 308pm respectively) had been assumed to contain an Mg2 unit ...