That is because the penny is only copper plated because putting any more copper would be too expensive. Despite this, the penny still costs more that one cent to produce...
Got all but one without really pausing, then spend 1,5 minute to think if I left out an obvious metal (well I did, about a minute in I remembered lead, obviously it wasnt in it). Finally tried manganese, and dont know where that came from, was surprised it was right! (Had also tried tin and gallium but I knew that wasnt gonna be right)
Interesting btw how people do think of platinum and not palladium. I would have expected a bigger gap between platinum and gold/silver than between platinum and palladium.
Bullion is a rare metal refined to a high level of purity. The most well known is probably a gold brick or bar. I didn't know that they are also made in coin form (or rather that thise are called bullion coins), but apparently, they do.
The 5-50¢ are all ~93% steel, ~4% copper, ~3% nickel plating, the cursed hendecagonal 1$ is pure nickel, and the 2$ has a ring of nickel and a central 92% copper, 6% aluminium, and 2% nickel
The coins of the GDR where almost all made out of aluminium cause it was cheap, but if you get one in your hand they are so light that they feel like childrens play coins
The 5-50¢ are all ~93% steel, ~4% copper, ~3% nickel plating, the cursed hendecagonal 1$ is pure nickel, and the 2$ has a ring of nickel and a central 92% copper, 6% aluminium, and 2% nickel