1/2inch
2 ways to make them: mould or swage.
did they make 1982 copper penny by mistake
Copper is an element in and of itself - you can't "mix" any other substances to get it. Copper is mixed with zinc to make brass, or with tin to make bronze.
Sulphuric acid, because "sulphuric" is what gives copper sulphate it's name
copper is an element, you cant make copper
Copper and carbon along with oxygen make up copper(II) carbonate. However you cannot make it simply by mixing them together. A possible pathway might be to get to sodium carbonate perhaps CO2 + NaOH might be the way and then make some copper sulfate by reacting it with H2SO4, mix your sodium carbonate solution with copper sulfate solution and copper carbonate should precipitate out.
Copper has been the metal of choice for as long as the denomination has existed. For US coins, that goes all the way back to 1793 with the introduction of the large cent. However, due to price increases, the penny was changed to copper-coated zinc in 1982.
copper and tin make bronze
Sulphuric acid is mixed with copper oxide to make copper sulphate through a chemical reaction.
Yellow, red and slight bit of blue make copper.
Copper has several redeeming qualities. It last long, does not rust, and won't grow bacteria. It also does not interact with water, making it good for pipes.
How ever long you want it to last.