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2013-02-11 22:08:35
2013-02-11 22:08:35

potassium + oxygen --> potassium oxide

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Related Questions


Tarnish on silver is Silver Oxide, which is oxidised silver. This is indeed a chemical reaction.


Tarnish refers to the color change on metal that is caused by a chemical reaction. Tarnish can be removed with baking soda and boiling water.



Neither. Tarnishing is a chemical change. The ability to tarnish is a chemical property.


When any type of metal is affected by heat, moisture, or gases, the metal begins to tarnish. This is a chemical reaction to whatever substance the metal has come in contact with and is able to react with it.


No. Lithium is the least reactive alkali metal. Within the same environment, potassium will tarnish at a faster rate.


Tarnish is an example of chemical change because the oxygen in the air is combining with gold or silver, or whatever the object is made of and makes the tarnish.


The tarnishing of silver is due to a reaction with hydrogen sulfide. Because the end result of the tarnish is silver sulfide, it is a chemical change.


Tarnishing is considered a chemical change. :)


most common metals tarnish slowly in exposure to air. metals that tarnish quickly in exposure to air are for example: lithium, sodium and potassium Gold is one of the slowest to tarnish.


It is a chemical change. Oxygen from the air combined chemically with the silver to form silver oxide- that is the tarnish.


Tarnish (AKA toning) is caused by exposure to air, chemicals, and/or dirt & oils from human fingers. A chemical reaction causes oxidation of the metal and the change in color. The same thing happens to silver coins. OMG



chemical, because when a penny is tarnished its a chemical change because, its weathered down its destroyed. The tarnish itself is usually either the oxide and/or sulfide of the underlying metal.


Why does metal Tarnish??Tarnish: CHANGE COLOURBecause of the air and water ( mostly rain ) and for example bikes tarnish because it is mostly left outside. If it was left inside it will eventually tarnish but take longer to. If you are wondering why cars don't usually tarnish it is because they are coated with a special metal thing to make it last longer. Also metals take longer to tarnish than others, this is why if you are getting married supposing you stayed together for life you need either gold, silver or platinum because it doesn't hardly ever tarnish. Potassium is the quickest to tarnish.Potassium...............................................................................................PlatinumMOST REACTIVE LEAST REACTIVE


tarnishing of silver is a chemical change


Chemical (the tarnish is silver oxide)



Tarnishing is a chemical change. The ability to tarnish is a chemical property.


Yes. Silver tarnishing is a chemical change.




No, it is a chemical change. The tarnish seen on silver is silver sulfide which formed by the silver reacting from small amounts of hydrogen sulfide in the air. So silver sulfide has been created by a chemical reaction.


Gold is one of the slowest. Lithium, sodium and potassium are very fast.


The tarnish on silver is due to oxidization



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