atomic number 12 | | |
n. (substance) | 1. atomic number 12, magnesium, mg | 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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