magnesium definition

  • noun:
    • A light, silvery-white, mildly hard metallic factor that in ribbon or dust type burns with a brilliant white fire. Its found in architectural alloys, pyrotechnics, flash photography, and incendiary bombs. Atomic quantity 12; atomic weight 24.305; melting point 649°C; boiling point 1,090°C; specific gravity 1.74 (at 20°C); valence 2. See Table at factor.
    • A light, flammable, silvery material, and a chemical factor (expression Mg) with an atomic number of 12.
    • A light silver-white metallic component of atomic number 12, malleable and ductile, rather permanent in dry air but tarnishing in moist atmosphere. It burns, developing (the oxide) magnesia, with all the production of a blinding light (the so-called magnesium light) which is used in signaling, in pyrotechny, or perhaps in photography in which a strong actinic illuminant is needed. Its compounds occur amply, such as dolomite, talc, meerschaum, etc. expression Mg. Atomic weight, 24.305. Specific-gravity, 1.75.
    • Manganese.
    • Chemical symbolization, Mg; atomic body weight, 24.4. The metallic root of the widely distributed alkaline earth magnenesia, that different combinations, and particularly by means of the two fold carbonate of lime and magnesia, is one of the most abundant associated with materials which make up the earth's crust.
    • a light silver-white ductile bivalent metallic element; in pure kind it burns with brilliant white flame; occurs normally only in combo (as with magnesite and dolomite and carnallite and spinel and olivine)

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