The current U.S. cent is copper plated zinc. Go back a bit and it was different. Here's the breakdown: 1793 to 1857 - copper 1857 to 1864 - 88% copper, 12% nickel (the so-called NS-12 alloy) 1864 to 1942 - bronze (95% copper, 5% tin and zinc) 1943 - zinc-coated steel (the so-called steel penny) 1944 to 1946 - brass (95% copper, 5% zinc) 1946 to 1962 - bronze (95% copper, 5% tin and zinc) 1962 to 1982 - brass (95% copper, 5% zinc) 1982 to present - 97.5% zinc core, 2.5% copper plating The history of the U.S. cent is a long and interesting one. A link can be found below if you're curious about reviewing it.
copper and zinc
To make metals rust.
basically, the zinc electrons in the NaOH solution coat the copper penny and then when you wave it over a Bunsen burner, the two metals form an alloy (a homogeneous mixture with two or more elements) and make brass, not gold.
A penny is an alloy because it is a mixture of different metals A penny is not an alloy because it's not really a "mixture" of zinc and copper. Post-1983 pennies are 97.5% zinc core with the remaining 2.5% of copper layer on top. Search for "Make a brass penny" to see how one makes a penny an alloy by heating it up enough to melt and mix the metals, making the penny appear gold.
Magnesium
copper and zinc
There's no such thing as a "lead penny". The only metals used to make U.S. cents have been copper, bronze, steel (1943 only) and zinc (1982-present).
The coinage elements are the metals that are used to make coins. They are the three metals from Group 11 of the periodic table - copper, silver and gold.
Their high conductivity is why transition metals are used to make electrical wires.
Steel and aluminum are used to make funs.
Aluminium.
The two most common metals used to make knives are steel and iron.
Copper and tin
Metals are used for the production of screws as they are materials with high hardness and resistance to stress.
British predecimal Pennies from 1860 to 1967 were made from bronze. Although the exact percentages of metals used to make up the bronze alloy varied over the years, the 1921 Penny was made from 95% copper, 4% tin and 1% zinc.
British predecimal Pennies from 1860 to 1967 were made from bronze. Although the exact percentages of metals used to make up the bronze alloy varied over the years, the 1922 Penny was made from 95% copper, 4% tin and 1% zinc.
Lead