atomic number 12
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|Noun||1.||atomic number 12 - 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)|
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
carnallite - a white or reddish mineral consisting of hydrous chlorides of potassium and magnesium; used as a fertilizer and as a source of potassium and magnesium
bitter spar, dolomite - a light colored mineral consisting of calcium magnesium carbonate; a source of magnesium; used as a ceramic and as fertilizer
magnesite - a white mineral consisting of magnesium carbonate; a source of magnesium
olivine - a mineral consisting of magnesium iron silicate; a source of magnesium
magnesia, magnesium oxide, periclase - a white solid mineral that occurs naturally as periclase; a source of magnesium
spinel - a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
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