Copper in penny

Answer 1

Assuming that you are asking about US Lincoln cents: If they are dated 1909-1982 (except 1943-46) - they are 95% copper and 5% zinc (with a tiny amount of tin up through 1962) and weigh 3.089 grams (147 to the pound) - 3.25g of copper per. If they are dated 1982-onward - they are 2.5% copper and 97.5% zinc and weigh 2.500 grams (181 to the pound) - 0.0625g of copper per. If they are dated 1982 - its tough to tell, because both types were minted. If they are dated 1943 - they are made of zinc coated steel and contain no copper If they are dated 1944-1946 - they are made from old brass shell casings (I'm not sure of the copper content, but likely similar to other pre-1982 cents).

Answer 2

For older cents made out of pure copper or a solid copper-bronze alloy, the question isn't valid. It's like asking what aluminum does for aluminum foil - it's simply what the coins were made of.

For newer cents with a zinc core, the copper coating (a) makes them look like older cents and (b) keeps the zinc from oxidizing.

Answer 3

Before 1982, pennies contained 95% copper, while those since 1982 are only 2.5% copper. Modern cents are mostly zinc.

Answer 4

bleach cleans the penny ..........but you have to wait about a week

Answer 5

Any unique physical or chemical changes depend on the specific liquid used in

the experiment. The only effect common to all liquids is to cause the pennies to

become wet.

Answer 6

It forms calcium deposits on them.

Answer 7

yes