Magnesium is a metallic element with the symbol Mg and atomic number 12. It was discovered in 1755 and isolated in 1808. Magnesium occurs naturally as the minerals dolomite and carnallite, and is most abundant in seawater. It has a silvery-white color, is fairly tough yet elastic, and poses a major fire risk. Common uses of magnesium include flares, reducing agent for uranium production, and as an alloy in computers and radios.

1. Magnesium Mg 24 12 By: Kasey Bacher

2. General Information Symbol: Mg Atomic Number: 12 Atomic Mass: 24 Group Name: Alkaline Earth Metal Group Number: 2 Boiling Point: 1363K(1090°C or 1994°F) Melting Point: 923K(650°C or 1202°F) Classification: Metallic

3. Discovery Discovered By: Joseph Black Discovered At: England Discovered When: 1755 Isolated By: Sir Humphry Davy Isolated When: 1808 Origin of the Name: Thessaly, Greece district region( Magnesia)

4. Minerals and Compounds Minerals Dolomite: CaCo 2 MgCo 3 Carnallite: Kcl-MgCl 2 -6H 2 0 Mostly Saltwater Compounds Hydrides: Magnesium Dihydride (MgH 2 ) Fluorides: Magnesium Difluoride (MgF 2 ) Chlorides: Magnesium Dichloride (MgCl 2 ) Iodies: Magnesium Diiodide (MgI 2 ) Sulfides: Magnesium Sulphide (MgS)

5. Characteristics Color: Grayish White Hardness: Fairly Tough Metal Elasticity: Risks: Major Fire Risk

6. Natural Isotopes Name Mass Abundance 24 Mg 23.9850423(8) 78.99(4) 25 Mg 24.9858374(8) 10.00(1) 26 Mg 25.9825937(8) 11.01(3)

7. Uses and Availabilities Uses Flares Reducing agent for production of uranium and others Making organ magnesium compounds Computers radio-frequency shielding Availabilities Massive amounts in seawater MgCl 2 : Magnesium Chloride through reaction with Calcium Oxide CaO

8. Web “ Compounds.” The Periodic Table on the Web. N.D. WebElements. September 23,2009 http://www.webelements.com/magnesium/compounds.html “ Uses.” The Periodic Table on the Web. N.D. WebElements. September 23, 2009 http://www.webelements.com/magnesium/uses.html “ Isotopes.” The Periodic Table on the Web. N.D. WebElements. Septermber 24, 2009 http://www.webelements.com/magnesium/isotopes.html “ Magnesium.” The Periodic Table on the Web. N.D. WebElements. September 23, 2009 http://www.webelements.com/magnesium/