Gold

 


 

Name Gold
Symbol Au
Atomic Number 79
Atomic Mass 196.967 atomic mass units
Number of Protons 79
Number of Neutrons 118
Number of Electrons 79
Melting Point 1064.43 C
Boiling Point 2807.0 C
Density 19.32 grams per cubic centimeter
Normal Phase Solid
Family Transition Metal
Period 6
Cost $500 an ounce

 


 

Origin of Name From the Old English word geolo, meaning yellow
Date and Place of Discovery Known to the ancients, circa 3,000 B.C.
Discovered by Unknown
Common Compounds
Interesting facts
  • It is found in copper ores and from the curst of the earth.
  • It is the most malleable and ductile metal.
  • Indians believe that a wedding without gold isn't a wedding.
Common Uses
  • A radioactive isotope of gold (gold-198) is used for treating cancer.
  • Gold sodium thiosulfate (AuNa3O6S4) is used to treat arthritis.
  • Chloroauric acid (HAuCl4) is used to preserve photographs.
  • Jewelry
  • Coins
  • Electronics

 

Photo Courtesy of About.com
Cary Academy
Chemical Elements
Corporate Watch
Jefferson Labs
Wikipedia




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