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Gold, a chemical element
With the symbol of Au and atomic number of 79 Gold is less chemically reactive than any other elements It is a good conductor of electricity and heat Which is ductile, shiny, soft and dense Also malleable that can easily be beaten. |
Gold's fun fact ...
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Gold in chemistry:
Gold is the noble gas because it doesn’t suffer oxidation both in air and oxygen at any temperature.
All the halogens react with gold:
Gold readily dissolves in mercury at room temperature to form an amalgam. Gold forms alloy with many other metals at higher temperatures. This property is used in the extraction of gold from the gravel and black sand. Gold reacts with potassium, rubidium, or caesium, to form the respective auride salts, containing the Au- ion. Gold is unaffected by most acids such as hydrofluoric ( FH ), hydrochloric (HCL), hydrobromic (HBr), hydriodic (HI), sulfuric (H2SO4), or nitric acid (HNO3). Aqua Regia ( HNO3 and HCL) dissolves the gold easily. |
Gold is similarly unaffected by most bases.
It does not react with aqueous, solid, or molten sodium or potassium hydroxide. Common oxidation states of gold include +1 (gold (I) or aurous compounds) and +3 (gold(III) or auric compounds). Gold ions in solution are readily reduced and precipitated as metal by adding any other metal as the reducing agent. The added metal is oxidized and dissolves, allowing the gold to be displaced from solution and be recovered as a solid precipitate. |
How gold get its golden color?
THE SOURCE OF GOLD
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if you want to know how gold was formed in the universe and also how gold can be found on Earth ( what brought gold to Earth ).
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Reference:
http://www.miningandmetallurgy.com/gold/html/gold_properties___gold_chemist.html
http://www.webexhibits.org/causesofcolor/9.html-
http://www.goldgold.com/gold-prospectingcharacteristics-of-gold.html