Silver
is a metallic chemical element with the chemical
symbol Ag and atomic number
47. A soft, white, lustrous transition
metal, it has the highest electrical conductivity of any element and
the highest thermal conductivity of any metal. The
metal occurs naturally in its pure, free form (native silver), as an alloy with gold and other metals, and
in minerals such as argentite and chlorargyrite.
Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.
Silver
has long been valued as a precious metal, and it is used as an
investment, to make ornaments, jewelry, high-value tableware, utensils (hence the term silverware), and currency coins. Today, silver metal
is also used in electrical contacts and conductors, in mirrors and in catalysis
of chemical reactions. Its compounds are used in photographic
film, and dilute silver nitrate solutions and other silver compounds
are used as disinfectants and microbiocides (Oligodynamic effect). While many medical antimicrobial
uses of silver have been supplanted by antibiotics,
further research into clinical potential continues.reference: http://en.wikipedia.org/wiki/Silver
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