| Magnesium (magnesium) |
|---|
| n. | (?) |
|---|
| Mag*ne"si*um |
| [NL. *** F. See
Magnesia.] (Chem.) |
A light silver-white metallic
element, malleable and ductile, quite permanent in dry air but
tarnishing in moist air. It burns, forming (the oxide) magnesia, with
the production of a blinding light (the so-called magnesium
light) which is used in signaling, in pyrotechny, or in
photography where a strong actinic illuminant is required. Its
compounds occur abundantly, as in dolomite, talc, meerschaum, etc.
Symbol Mg. Atomic weight, 24.4. Specific gravity, 1.75.
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In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 