The copper in the pennies reacts with the air and forms copper oxide, which is greenish in color. It is a slow process and can be reversed by cleaning the penny with an acidic solution.
nothing makes it tarnished it is just basically and old or used penny that instead of looking shiny brown it looks dark brown or even green.
Coke will not melt a penny or a nail; that process would involve heat. Instead, the acid from the soda may oxidize some of the metal atoms in the penny and the nail, causing them to become ions and soluble. The some of the metal will dissolve, causing the penny or nail to become pitted and tarnished. However, these objects will not melt.
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the sun was tarnished by the moon.
By removing some of the copper on the tarnished penny. when tarnish sets on a penny it becomes dull and loses it shine .the acid which acts like a cleanser takes off the build up of tarnish and brings back the shine of the copper that pennies are made of
a chemical change
Scratching it
A tarnished penny is a penny that has been discolored or dulled due to oxidation of the metal surface, usually resulting in a dark or dirty appearance. Tarnishing can occur over time when the penny is exposed to air and moisture.
The acid in the drink gets into the tarnished or the dirt particles and will clean it but you might have to leave it in for a few days.
penny
If you have any tarnished pennies in your penny jar, you can easily clean them in vinegar. If you leave your pennies in white vinegar and salt for about 30 minutes and they will come out shiny and pretty clean. Be sure to rinse the vinegar off.
Coke will not melt a penny or a nail; that process would involve heat. Instead, the acid from the soda may oxidize some of the metal atoms in the penny and the nail, causing them to become ions and soluble. The some of the metal will dissolve, causing the penny or nail to become pitted and tarnished. However, these objects will not melt.
I have three items of tarnished silver jewellery
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.
The Tarnished Eye was created in 2004.
i know a penny can rust, but im not sure what makes a peny rust! i, too, hope to find out!
Five cents in uncirculated condition. If the coin is worn/tarnished/shows signs of being in circulation, it may only be worth its face value.
100 penny makes a dollar. Every penny counts, my friend!