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Transcript of Gold
Family: Trasition Metals
Isotopes: Radioisotopes Chemical Properties Gold has been used as far back as the Bronze age. Early artisans of the time periode use gold to fashion jewlry Symbol Element Atomic Mass State: solid
Colour: metallic yellow
Luster: shinny yellow/metallic luster
Melting Point: 1,o64 ºC
Boiling point: 2,856 ºC Combustibility: Gold is nonreactive with oxygen, it is used in jewelery as it will not tarnish easily Reaction with acid: Gold metal dissolves in aqua regia, a mixture of hydrochloric acid and concentrated nitric acid in a 3:1 ratio. Jewelry Gold Coins Manufacturing of electronics Fort Knox FINANCIAL BACKING FOR CURRENCY Gold is exreamly rare. According to all geographical experience it is only found in low concentrations in rocks. Where Found Gold is found throughout the earth and sea. But it is most commonly found along the edges of greenstone and associated with structural features How it's mined Gold is mined 4 different ways 1. Placer mining
2. Hard rock mining
3. Byproduct mining
4. Processing of gold ore