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MAGNESIUM

Sources

For human body

In industry

Mg in soil
plants
man	(1)

Vast deposits of ores (e.g. (2)) 0.12% Mg in seawater … trillions of tons in oceans (leached from (3) by rivers

Properties

An essential (4) for all living things At heart of chlorophyll mol. needed (5) to trap sun's energy and make sugar & starch mols Daily (6) ⅓ - ½ g Most Mg stored in bones – 25 g throughout (7) 3 …: (8) (i) regulates movements through membranes (ii) part of enzymes that release energy from food (iii) (9) Deficiency rare but signs are lethargy, irritation, depression

The most abundant metal on earth (i) does not burn in bulk (ii) tubes and rods (10) (iii) (11) (iv) can be cheaply recycled Prodn. > 300,000 t (about ½ from sea) > (12) per a. by end of C Expanding mkt

Uses

Medical

Industrial

Has been successful in treatment of chronic fatigue syndrome, according to recent research

in steel refining to remove (13) & strengthen aluminium Cycle, luggage, car seat (14), disc drives, camera & vehicle parts

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