Silver

Silver is rarer than gold

Basic Information

Element name: Silver

Symbol: Ag

Atomic Number: 47

Atomic Weight: 101.87

Group: 11 (Coinage metal)

Period: 5

Color: Pure silver has a brilliant white metallic luster

Classification: Metallic

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History

Man has learned to separate silver from lead from as early as 3000 B.C., as evidenced by slag dumps in Asia Minor and on islands in the Aegean Sea. The word silver comes from teh Anglo-Saxon word "siolfur". The Latin word for silver is "argentum".

Uses

Silver is used as an alloy in jewelry, tableware, electrical contacts and batteries, dentistry, solder and brazing alloys. Silver paints are used for making printed circuits. Silver was used to make mirrors

Description

Silver has a brilliant white metallic luster when pure. The melting point is 1763.2 degrees Farenheit

Biology and Geology

No data for the ppb (parts per billion) by weight in humans. Silver is in ores including:

+ Lead

+ Lead-zinc

+ Copper

+ Argentite

+ Gold


Deposits in Australia, Canada, Chile, Germany, Norway, Sardina, Mexico, and the USA. 0.6 ppb in the universe, 80 ppb in crustal rocks, 1 ppb in the sun, 140 ppb in meteorites, and 0.1 ppb in sea water


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Properties

Silver is very ductile and malleable, is a good conductor of electric current and thermal conductivity, it has low contact resistance

Interesting Facts

Pure silver has the highest thermal and electric current of all metals. Silver iodide (Agl) was used for causing clouds to produce rain. Tarnishes, or rusts black, when exposed to air containing sulfur, ozone, or hydrogen sulphide. The Roman coin, a denarii, was made of silver. Silver is the best known reflector of visible light. Silver has an alchemical symbol