1 / 11

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

eagan
Download Presentation

Gold (Au)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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>.

More Related