silver, Physics

Silver

 

Symbol

 

 

Ag

Atomic weight

107.868

 Atomic number

 

47

discovery

Known since prehistoric time. Man learned to separate silver from lead early as 3000B.C.

Word origin

Anglo-Saxon seolfor or siolfur, meaning 'silver' and Latin argentums.

Melting point

961 degree centigrade

Boiling point

2212 degree centigrade

Specific gravity

10.50 (200C)

Electrical resistivity

1.5*10-8 ohm-m

 

 

Properties:

1.      Pure silver has a brilliant white luster.

2.      It is very ductile and malleable, exceeded in these properties by gold and palladium.

3.      It has the highest electrical and thermal conductivity of all metals.

4.      It has a low surface contact resistance.

5.      In order to make it harder 15% of copper is added into it. To make it more hard for use in commutate segment of small dc. Motors as alloy of silver-copper containing 40% of copper is used.

6.      It is superior to copper in its resistance to oxidation.

Uses:

1.      The alloys of silver have many commercial uses. Sterling silver (92.5% silver, with copper or other metals) is used for silver ware and jewellery.

2.      Silver is used in photography, dental compounds, solder, brazing, electrical contacts, batteries, mirrors and printed circuits.

3.      Silver chloride can be made transparent and is used as cermets for glass.

4.      Silvered compounds can be absorbed into the circularly system, with deposition of reduced silver in body tissues. This may result in argyria, which is characterized by a greyish pigmentation of the skin and membranes. Silver is germicidal and may be used skin and mucous to kill lower organism without harm to higher organisms.

5.      Silver is also used as coinage in many countries.

Sources: Silver occurs native and in ores including argentite and horn silver. Lead, lead zinc, copper, copper-nickel, and gold ores are other principal sources of silver. Commercial fine silver is at least 99.9% pure. Commercial purities of 99.9999% are available.

Posted Date: 7/21/2012 7:45:35 AM | Location : United States







Related Discussions:- silver, Assignment Help, Ask Question on silver, Get Answer, Expert's Help, silver Discussions

Write discussion on silver
Your posts are moderated
Related Questions
Q. What are leptons? Give examples. Leptons: Leptons are lighter particles having mass equal to or less than about 207 times the mass of an electron except neutrino an

A bar magnet having of two equal and opposite magnetic pole separated by a small distance. Poles are not precisely at the last. The smallest distance among two poles is known as ef

HOW TO MARK DIRECTION OF ACCELERATION TO APPLY WEDGE CONSTRAINTS ..

Part A) Infra-Red (IR) Detectors: An IR detector has an impedance of Z= (400+j200) ? . . During design tests the detector current is measured as 4 µA. What is

what is kinetics

The high-dive board at most pools is 3.00 m above the water. A diving instructor dives off the board and strikes the water 1.18 s later. a. What was the initial velocity of the


The stopping potential of a photocell is 2.3 V. What is the initial velocity of an emitted photoelectron that is brought to a stop by the photocell?

What is the acceleration due to gravity and does the number ever change on earth

What mechanical and electronic device has a name derived from a Czechoslovakian word meaning "work; compulsory service"? Ans: From a Czechoslovakian word meaning "work; com