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Magnesium (Amanda Manning)


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Magnesium (Amanda Manning)

  1. 1. Magnesium (Mg)
  2. 2. Origin of the Name The name for Magnesium derives from the ancient city of Magnesia in Thessaly, Greece
  3. 3. The Discovery • Sir Humphry Davy first isolated magnesium in 1808. • He passed an electric current through magnesium oxide. This compound broke apart to form magnesium metal and oxygen gas. • Joseph Black, a Scottish chemist, discovered magnesium in 1755. • He showed that magnesium and oxide were different and not lime as most thought. Black Davy
  4. 4. Properties • Solid at room temperature • A silvery white element • 648.8˚C melting point and 1090˚C boiling point • Density at 19.85˚C is 1.738 grams per cubic centimeter • Structural properties similar to aluminum
  5. 5. Limitations Since magnesium is highly flammable at specific temperatures, its uses are limited. LA1z4&playnext=1&list=PL2B6CF7F161874AB6&index=20
  6. 6. Isotopes • 24Mg (78.7%) • 25 Mg (10.13%) • 26 Mg (11.17%) • 28 Mg (This is a radioactive isotope of magnesium.)
  7. 7. Availability • 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.
  8. 8. Magnesium is the 6th most abundant element in the Earth’s crust; its abundance being about 2.1%.
  9. 9. • 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
  10. 10. 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 green vegetables.
  11. 11. The Primary Uses of Magnesium • Flash photography o Magnesium metal can also be found in cameras that use flash bulbs. o When the flash is ignited, the magnesium catches on fire. o While burning, it will produce a very bright white light.
  12. 12. Primary Uses (cont.) • Pyrotechnics o The burning of magnesium is also used in fireworks, producing the white sparkle effect.
  13. 13. Primary Uses (cont.) • Magnesium alloys is used to make certain components of airplanes, missiles, and other items that make important use of the light metals. • Cost o The cost for pure magnesium is $3.70 per 100 grams.
  14. 14. Primary uses: The Major Compounds of Magnesium • Magnesium Sulfate o Epsom Salt: Soaking in this salt soothes sore muscles and removes dry skin.
  15. 15. Major Compounds • 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 antacid.
  16. 16. 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 reducer
  17. 17. Fun Magnesium Videos • The reaction of Magnesium with Carbon Dioxide – =related • The reaction of Magnesium and Oxygen to make Magnesium Oxide – • The reaction between Magnesium and Iodine – e=related • Reaction between powdered Magnesium and Water – =related
  18. 18. References • 356899/magnesium • C • • s/L-P/Magnesium.html • ium.html