Starting mid-year in 1982, pennies were made with a zinc core and copper plating. This would give them a 97.5% zinc content and 2.5% copper content.
1980 Lincoln cents were struck on planchets made of a copper alloy with a composition of .950 copper and .050 zinc.
97.5% zinc, 2.5% copper.
1983 to date the percentage of copper is .025%
They're not.
1983 and later - copper plated zinc. Some 1982 coins were all copper and some copper plated zinc.
It depends if you are talking about pre-1982 pennies or post-1982 pennies.
Today's pennies (since 1983) are made almost entirely of zinc, with a thin outer coating of copper.
The US never made silver pennies. In 1943 the US made steel pennies. These are often mistaken for silver pennies.
Pennies today are made of 97.5% zinc and 2.5% copper.
Yes, in the 1970s pennies were made of 95% copper while in the 1990s they were made of about 97% zinc.
1860 The last copper pennies were made in England, and the same year the first bronze pennies were made.
According to the US mint, 6015.2 million pennies were made in 2012.
Pennies were made of pure copper until 1975, because it costed more than 100 pennies just to make a penny.