Silver

Chemical element with symbol Ag and atomic number 47

Silver (symbol Ag) is a chemical element. In chemistry, silver is element 47, a transition metal. It has an atomic weight of 107.86 a.m.u. Its symbol is Ag, from the Latin word for silver, argentum.

Silver bar, or ingot

Propertieschange

Physical propertieschange

Silver is a soft metal. It is also a precious metal. When it is used in money or in jewellery, it is often alloyed with gold or some other metal to make it harder. It is bluish-white. Among metals, it is the most reflective and the best conductor of electricity and heat. It is considered a precious metal. It is very malleable and ductile, which means it can be pulled into wire or hammered into thin sheets. Silver is one of the few words in the English language that does not rhyme with any other word. Silver coins and bars can be bought and sold at coin shops around the world.

Chemical propertieschange

Natural silver tarnished

Silver is less reactive than most other metals. It does not dissolve in most acids. Nitric acid dissolves it, though, to make silver nitrate. It does react with strong oxidizing agents like potassium dichromate or potassium permanganate. It does not corrode easily. It only corrodes when there is hydrogen sulfide in the air. Then, it forms a black coating known as tarnish.

Silver(I) oxide

Silver exists in two main oxidation states: +1 and +2. The +1 is much more common. A few compounds exist in the +2 oxidation state, but they are very strong oxidizing agents. Silver compounds can be brown, black, yellow, gray, or colorless. Silver compounds are disinfectants.

Silver(I) compounds

Silver(I) compounds are oxidizing agents. They are more common. Most of them are very expensive.

Silver(II) compounds

Silver(II) compounds are powerful oxidizing agents and rare.

Occurrencechange

Silver as a metal

Silver can be found as a native metal. Silver can be found with copper, lead, or gold in rocks. The rocks are found mostly in Canada, Mexico, Peru, and the United States. Peru produces the most silver. Silver is also in chemical compounds.

Acanthite is a silver ore that is a silver compound.

Acanthite

Preparationchange

Silver is extracted from the earth in several ways. It is normally extracted using electrolysis.

Useschange

As an elementchange

Silver has been used for many thousands of years by people all over the world, for jewellery, as money, and many other things. It is called a white metal even though it looks grey. The word silver is also used to talk about this color or shade of grey. Silver is also used for utensils. It may be used to fill teeth in dentistry as an amalgam. Silver is used as a catalyst.

In compoundschange

Silver compounds are disinfectants. It can kill bacteria and has other useful properties. It is used in the silver oxide battery. They are also used in photographic film. They can also be used to reduce odors in clothes. Some silver compounds are used in creams that help burns heal.

Historychange

Silver has used for thousands of years. It was normally considered second to gold in value. Many people including Romans and Chinese used silver as money. The symbol Ag is from the Latin name for silver, argentum. Silver was also used to prevent infections and decay.

Safetychange

Silver is not a large danger to humans. Silver compounds are toxic. They make the skin turn blue. Some can be carcinogens. Colloidal silver, a common homeopathic remedy, is not toxic in normal amounts, but it does not do much.

Marketchange

More silver has been used each year than the amount mined in each year since 1990, when the amount mined each year stopped growing and its use increased. Companies that use silver have benefited from speculators who sell promises to deliver silver that does not exist, keeping prices artificially low. This is called naked short selling. The amount owed is more than all the silver in the world. The price of silver could go very high when the stored silver runs out and investors start asking for their metal back, instead of taking more I.O.U.'s.

The price of silver increased to 28 US dollars per troy ounce as of December 2010.

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