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Gold (Au)

Gold (Au). What is gold. Symbol: Au Atomic no.: 79 It’s Solid Least reactive chemical element. How is it formed?. Formed in the underground vents of volcanoes Hot gases carry elements within them

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Gold (Au)

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  1. Gold (Au)

  2. What is gold • Symbol: Au • Atomic no.: 79 • It’s Solid • Least reactive chemical element

  3. How is it formed? • Formed in the underground vents of volcanoes • Hot gases carry elements within them • Elements (Silicon dioxide) condense and remain there until volcano erode or miners digging them out

  4. It belongs to group 11, the transition metals

  5. How is it extracted • Extracted from mines with pick axes (old days) • Now extract through mining with high-tech machines

  6. Reactions • Reaction with water: None • Reaction with flame: None • Reaction with oxygen: None

  7. Physical Properties • Boiling point: 5100-5200oF (2815.6-2871.1oC) • Melting point: 1948.5oF (1064.7oC) • Highly ductile • Malleable • Soft • Yellow and shiny • Quite dense and its highly reflective metal • Good conductor of heat and electricity

  8. Chemical Properties • Chemically inactive • Highly resistant to react with other elements • Does not corrode easily • Reacts with HCl and nitric acid

  9. Uses • Gold jewelry • Glass that have red or purple colors • Electronic products (Computers, telephone…etc.) • Gold coins in ancient world

  10. Sources • Baxamusa, Batul. "Chemical Properties of Gold." Buzzle.com. Buzzle.com, 22 Nov. 2010. Web. 11 Feb. 2014. <http://www.buzzle.com/articles/chemical-properties-of-gold.html>. • "How is gold extracted." Ezinearticles. N.p., n.d. Web. 11 Feb. 2014. <http://ezinearticles.com/?How-is-Gold-Extracted?&id=3916673>. • "GCSE CHEMISTRY - The Reactivity of Metals with Oxygen - GCSE SCIENCE.." GCSE CHEMISTRY - The Reactivity of Metals with Oxygen - GCSE SCIENCE.. N.p., n.d. Web. 11 Feb. 2014. <http://www.gcsescience.com/r2-metal-reaction-with-oxygen.htm>.

  11. "Gold." WebElements Periodic Table of the Elements. N.p., n.d. Web. 10 Feb. 2014. <http://www.webelements.com/gold/chemist • Iyer, Sujata. "Physical Properties of gold." Buzzle.com. Buzzle.com, 12 Mar. 2012. Web. 11 Feb. 2014. <http://www.buzzle.com/articles/physical-properties-of-gold.html>.

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