The Element No. 47

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The Element No. 47
Silver, Fighting Bacteria One Cell Membrane at a
Time

• By Alisha Monsibais

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Silver

47
Atomic Number 47Atomic Weight 107.
8682Density 10.501Melting Point 1234.93
KBoiling Point 2435 KState at Room Temp
SolidElement Classification Metal
Ag
Silver
107.8682
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Definition of Silver

• The Element Silver is defined as a lustrous
  white, ductile, malleable metallic element,
  occurring both uncombined and in ores such as
  argentite, having the highest thermal and
  electrical conductivity of the metals. It is
  highly valued for jewelry, tableware, and other
  ornamental use and is widely used in coinage,
  photography, dental and soldering alloys,
  electrical contacts, and printed circuits.

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History of Silvers Name

• gtThe word silver is from the Anglo-Saxon word
  seolfer
• gtThe chemical symbol comes from the Latin word
  argentum, also meaning silver.

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Silver and the U.S.

• In 1792, silver assumed a key role in the United
  States monetary system when the currency was
  based on the silver dollar. Silver was used for
  the nations coinage until its use was
  discontinued in 1965. The beginning of the 20th
  century manifested an important economic function
  for silver, that of an industrial raw material.

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Common uses of Silver

• Currency
• Jewelry
• Silver wear
• Photographs
• Dental Alloys
• Electrical Conductor

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Why we use Silver for Silver Wear. . . .

• Sterling silver is the most hygienic metal known
  to man. It has actual germ killing properties. It
  is also the most durable art form and the most
  economical purchase that can be made for the
  home. Sterling silver grows more beautiful with
  the passing years, never wears out, and can be
  passed along as part of a heritage that grows
  stronger with passing generations.

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Interesting Compounds

• High capacity batteries can be made with silver
  and zinc and silver and cadmium.
• Sliver nitrate (AgNO3) is light sensitive and is
  used to make photographic films and papers.
• Silver iodide (AgI) is used to seed clouds to
  produce rain.

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Silver Medicine

• Silverlon Bandages are currently in use by
  hospitals such as Johns Hopkins, the Mayo Clinic,
  Northwestern University, University of Michigan,
  and Baylor University as well as several active
  military units in Afghanistan, Iraq and Germany.

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Interesting Facts

• Pure Silver is the best conductor of heat and
  electricity of all the known metals
• Silver has superior bactericidal qualities. Small
  concentrations of silver or silver salts kill
  bacteria by chemically affecting the cell
  membranes, causing them to break down.
• Silver has the highest degree of optical
  reflectivity of all elements. A silver mirror can
  reflect about 95 of the visible light spectrum.
• Silver can be drawn into a wire finer than a
  human hair
• We have a federal law which requires that all
  silver stamped "sterling" must be 925 parts of
  pure silver in every thousand parts of metal. The
  additional 75 parts out of a thousand are to add
  stiffness and durability as pure silver is quite
  soft.