Gold
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Index Periodic Table Chemistry concepts | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Gold
Gold is bright yellow by reflected light, but in thin films may be blue or green. Gold is the most malleable and the most ductile of all metals. It can be hammered into sheets only 1/100,000 cm thick and drawn into wires 1/5000 cm in diameter. Gold is often alloyed with copper, silver, palladium or other metals. The amount of gold in these alloys is described in carats. The carat value is the number of parts of gold in 24 parts of alloy, so that 24 carat gold is the pure metal. American coinage gold is 21.6 carat and British coinage is 22 carat. White gold as used in jewelry is usually an alloy of gold and nickel. Gold is found in the mineral nagyagite, a sulfide, along with lead, iron, antimony, and tellurium. Tellurium combines with gold to form krennerite and calaverite, both with the empirical formula AuTe2. These two minerals are said to be dimorphs of each other. Gold and silver combine with tellurium to form the mineral sylvanite, AgAuTe4.
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Index Periodic Table Chemistry concepts Reference Pauling Ch. 28 | ||||
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Gold Nuclear Data
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Index Periodic Table Chemistry concepts Reference Rohlf | |||||||||||||||||||||||||||||||||||||||||
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