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Essay Galaxy - Magnesium
Magnesium
Magnesium is one of the alkaline-earth metals of main group IIa in the
periodic table. Magnesium is a grayish-white metal. Normally magnesium is
covered with a layer of oxide, MgO, that protects magnesium from air and
water. Magnesium is an important element for plant and animal life.
Chlorophylls depend greatly on it.Sir Humphrey Davy discovered magnesium in
1775 at England. It was dicovered when he evaporated magnesium amalgam by
mixing a moist magnesia and mercuric oxide. The meaning of the name comes
from a Greek word ‘'Magnesia.''
Properties of pure magnesium:
Atomic number 12
Atomic mass 24.31
Colour Silv
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