Oxygen reacts with the copper in the penny, the copper oxidizes and it turns green. The Statue of Liberty is made of copper. Over the century, it reacted with oxygen and turned green. This is a chemical change.
The property of copper that can account for the blue or green discoloration of pennies is its chemical reactivity: the tendency of copper to combine chemically with constituents of the atmosphere (including pollutants) together with moisture. The chemical changes degrading the copper in useful objects is referred to as "corrosion". Many corrosion products of copper are colored blue to green. These include the green cuprous and cupric chlorides, the green carbonate (malachite), the blue carbonate (azurite), and blue sulfate.
If you treat a copper penny with Ammonia it will turn Blue. The ammonia that I am referring to is common household ammonia which is Ammonium hydroxide. This is this chemical formula:
NH3 + H2O NH4+ + OH-.
The copper metal it contains oxidizes or tarnishes the metal.
Carbon dioxide in the air...
it is the nickel that makes the nickel carbonate green
Look at my green
copper tarnish and turn green because of present of iron in it.
NO! copper turns green
the toxic gas in the baking soda makes bubbles with the vinegar mixed in it makes a chemical reaction and then makes a new product.
Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies. Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies. Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies. Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies.
Pennies are made, or at least coated, with Copper and that copper can oxidize and turn green. Newer pennies have an alloy metal that is supposed to reduce this chemical action.
The pennies turn green because they are open to the air, because they contain copper, and because copper turns green when oxidized.
There is no well-known "Green-penny hypothesis" as far as I can tell. I suppose some student every so often creates their own hypothesis about why pennies turn green, but they are certainly not well-known, or even slightly-known.
You can also turn pennies and some other coins green by letting them sit overnight in a paper towel soaked in vinegar. and if you want to clan pennies to shine, put them in a cup of vinegar and salt dissolved. (I once tried cleaning them with a pinch of kosher salt instead and it dug a hole through the penny! -NOT RECOMENDED!!!)
The chlorophyll in the plant.
Chloroplast has the photosynthetic pigments chlorophyll.Chlorophyll makes plant green.
they are green because they eat many sea grasses wich in turn makes there bellyfat green
At 100 pennies to the dollar, 50,000 pennies makes $500.