Metals and their uses
- Metals are usually found in the Earth's crust. They are often combined chemically with other elements such as oxygen.
- An ore contains enough metal to make it worth extracting the metal.
- The method we use to extract a metal depends on its reactivity.
- Unreactive metals are found in the Earth as the metal.
- The oxide of metals less reactive than carbon can be reduced using carbon.
Iron and steels
- Iron oxide is reduced in a blast furnace to make iron.
- Iron from the blast furnace is too brittle for many uses.
- Most iron is converted into alloys called steels.
- Steels contain carefully controlled quantities of carbon and…