Gold
Dalyn LeGrand and Zach Suchanick
History
Gold has been known since ancient times. Though we don't know where it originated from we know the word gold comes from the Anglo-Saxon word gold while the origin of the symbol Au is the Latin word aurum meaning gold.
Gold Properties:
- Malleable
- Ductile
- Heavy
Uses Of Gold
Dentistry
Conductor Of Electricity
Gold is a highly efficient conductor of electricity and is used in most electronic devices, including cell phones. Gold contained in connectors, switches and relay contacts allows phones to remain free of corrosion.
Medically
The earliest medical use of gold can be traced back to China in 2500 BC. Chinese physicians used pure gold to treat furuncles, smallpox, skin ulcers and to remove mercury from skin and flesh.
Compounds with Gold
- chlorauric acid (HAuCl4)
- Gold (III) Bromide (AuBr3)
- auric chloride (AuCl3)
Information
- Atomic Number - 79
- Atomic Weight - 196.9678 g
- Protons - 79, Electrons - 79, Neutrons - 118
- Gold is a mono-isotopic element
Gold has 1 valence electron
Properties of Transition Metals
- Low ionization energies
- High melting points
- High boiling points
- Good conductors of heat and electricity
- Malleable
Gold + Chlorine pt. 1
- This is Synthesis
- 2 Au + 3 Cl2 → 2 AuCl3
- 2 mol Gold : 3 mol Chlorine : 2 mol Gold Trichloride
Gold + Chlorine pt. 2
- AuCl3
- Gold Trichloride
- Ionic
- 51% Gold, 49% Chlorine
GOLD
Our
Ladies
Delight
Citations
Winter, Mark. "Gold: Physical Properties." Gold»physical Properties [WebElements Periodic Table]. N.p., n.d. Web. 02 May 2016.
"The Many Uses of Gold - U.S. Global Investors." The Many Uses of Gold - U.S. Global Investors. N.p., n.d. Web. 02 May 2016.
"Learn Properties of Transition Metals." About.com Education. N.p., n.d. Web. 02 May 2016.
Winter, Mark. "Gold: Reactions of Elements." Gold»reactions of Elements [WebElements Periodic Table]. N.p., n.d. Web. 03 May 2016.
The Editors of Encyclopædia Britannica. "Gold (Au)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 03 May 2016.