Originally, 95% copper and 5% zinc. US pennies are now made of zinc with a thin copper coating.
copper
Copper
compound
Modern US cents are made of copper plated zinc. Starting midway through 1982 the penny switched from bronze to copper plated zinc. So if you have a penny dated 1983-present you for sure have a penny with zinc on the inside.
A penny if that is what you are asking for.
Abraham Lincoln is on the US penny
Abraham Lincoln is on the US penny.
A Penny is not a compound. It's just one word.
Its zinc
Lincoln is on this penny.
There are no ridges on a US Penny or the US Nickel, the edges are smooth.
The diameter of a US penny is 0.01905 metres