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Magnesium - Paper

Magnesium

is one of the alkaline-earth metals of main group IIa in the
periodic table. is a grayish-white metal. Normally is
covered with a layer of oxide, MgO, that protects from air and
water. 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 Silvery grey metal
Density 1.738 g.cm -3 at 20ºC
1.58 g.cm-3 at 650RC ...

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cp at 650ºC (1)

The magnesium element has the atomic number of 12 and atomic weight of
24.3050. It's symbol is Mg. The group number that mg is in is group 2a.
It's electronic configuration of

[Ne].3 s2.
Physical data
Standard state: solid at 298 K
Colour: silvery white
Density of solid at ambient temperature/kg m-3: 1738
Molar volume/cm3: 14.00

Table on isotopes:

Nominal mass Accurate mass% natural abundance
24Mg 23.9850423 (8) 78.99 (3)
25Mg 24.9858374 (8) 10.00 (1)
26Mg 25.9825937 (8) 11.01 (2)

Magnesium is the 6th most abundant element metal on the surface of the
earth at about 2.5% of its composition. Sea water contains 0.13% Mg and
some facilities use the magnesium for the production of magnesium metal.
This happens when the precipitation of other salts leave a ...

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PAPER DETAILS

Added: 2/3/2007 12:07:03 PM
Category: Science & Nature
Type: Premium Paper
Words: 518
Pages: 2

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