The dark brown color of a penny is most likely oxidation, which occurs when the copper in the penny comes in contact with oxygen. Since the average penny circulates for 25 years, a...
Yes, the tarnish is copper oxide. But actually the tarnish is not from when the
pennies are made (brand new pennies are shiny); the tarnish is from the copper
Pennies are bright and shiny when they're new, but become quite dull with time.
What causes such a drastic change? Oxygen in the air ..... GET INVOLVED.
In October---, you said that today, pennies are copper plated zinc. ... And also
what causes them to get dirty and what is the dirty stuff on the surface of the
Oh, I have one more question, what actually causes pennies to get dirty?
THANKS A BUNCH FOR YOUR HELP! Kalyn [last name deleted for privacy by
www.ask.com/youtube?q=What Causes Pennies to Get Dirty&v=kufXLB1GF94
Nov 6, 2012 ... Clean all your dirty cents or any copper metal using vinegar and salt Music: ... I'm
sure you can get more than 2 antique pennies from the jar.
Because pennies are made of copper, they don't actually rust. ... What Causes
Copper to Tarnish? How to Get Tarnish Off of a Gold Necklace · How to Trade
Penny Stocks for Beginners · The Do's & Don'ts of Buying Penny Stocks ...
remove the copper oxide -- the cause of their dark and dirty appearance -- from ...
Mar 20, 2000 ... Why does Coca-Cola make a penny bright and shiny? Briefly, the phosphoric ...
What can you do to get rid of the oxide layer? You can polish it ...
How many pennies can you put in a full glass of water? How can ... Question:
How would you get a coin out of a dish of water without touching the water or ...
20 dirty pennies .... Spinning the pennies causes the center of gravity to be
Luckily, it's also the older pennies that are more likely to be dirty. ... To get rid of
this dull and often greenish substance, an acid needs to bond with the oxide and