Origin of the Name
The name for Magnesium derives from the
ancient city of Magnesia in Thessaly, Greece
• Sir Humphry Davy first
isolated magnesium in
• He passed an electric
magnesium oxide. This
apart to form
magnesium metal and
• Joseph Black, a Scottish
magnesium in 1755.
• He showed that
magnesium and oxide
were different and not
lime as most thought.
• Solid at room temperature
• A silvery white element
• 648.8˚C melting point and 1090˚C
• Density at 19.85˚C is 1.738 grams per
• Structural properties similar to
Since magnesium is highly flammable at specific
temperatures, its uses are limited.
• 24Mg (78.7%)
• 25 Mg (10.13%)
• 26 Mg (11.17%)
• 28 Mg (This is a
• Magnesium can be obtained by electrolysis of molten, or
melted, magnesium chloride found in seawater.
o Each cubic mile of seawater contains about 6 million tons
of this element.
Magnesium is the
6th most abundant
element in the
Earth’s crust; its
• There are two methods to obtain Magnesium:
1. An electric current is passed through a molten
compound of magnesium.
2. Magnesium is reacted with ferrosilicon, an alloy of iron
and silicon, to form free magnesium metal.
Electrolysis of magnesium chloride
Daily Consumption of Magnesium
• People usually have no problem obtaining the
300-400 milligrams of magnesium that is
recommended in our daily diet.
• It can be found in nuts, cereals, seafood, and
The Primary Uses of Magnesium
• Flash photography
o Magnesium metal can also be
found in cameras that use flash
o When the flash is ignited, the
magnesium catches on fire.
o While burning, it will produce a
very bright white light.
Primary Uses (cont.)
o The burning of magnesium is also used in
fireworks, producing the white sparkle effect.
Primary Uses (cont.)
• Magnesium alloys is used to make certain
components of airplanes, missiles, and other
items that make important use of the light
o The cost for pure magnesium is $3.70 per 100
Primary uses: The Major Compounds
• Magnesium Sulfate
o Epsom Salt: Soaking
in this salt soothes
sore muscles and
removes dry skin.
• Magnesium oxide (Magnesia)
o Used in the production of glass and ceramics
• Magnesium Hydroxide (Milk of Magnesia)
o Used as a laxative for constipation and as an
Medical Uses for Magnesium
• A few examples include:
o Magnesium bromide- a sedative to help one sleep
o Magnesium acetylsalicylate- a pain killer and fever
Fun Magnesium Videos
• The reaction of Magnesium with Carbon Dioxide
• The reaction of Magnesium and Oxygen to make
• The reaction between Magnesium and Iodine
• Reaction between powdered Magnesium and Water