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...
Dirty pennies have a variety of causes. penny graph image by RT from Fotolia.
com. There are currently over 130 billion pennies circulating in the United States.
10 dirty pennies; 4 tablespoons lemon juice; 8 tablespoons vinegar; 1 teaspoon
salt; small bowl (not metal!) 1 spoon (not metal!) paper towels or napkins ...
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
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.
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.
How many pennies can you put in a full glass of water? ... 20 dirty pennies ....
Heat causes objects to expand (get bigger), while cold causes objects to contract
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 · The Do's & Don'
ts of Buying Penny Stocks · What Are Penny Stocks, ... the salt it reacts to remove
the copper oxide -- the cause of their dark and dirty appearance -- ...