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Carbon group elements
 Carbon – Charcoal is a non-crystalline form of carbon. Because it is made of wood and is cheap, it is used as a fuel in the developing world, where people need a fuel that provides a high temperature for cooking but where they cannot afford to use electricity, bottled gas, or kerosene. Charcoal is also made into briquettes for barbecues in industrial countries.
 Carbon – Crude oil contains hydrocarbons. From these hydrocarbons come the fuels that power the modern world, and the raw materials for plastics, fertilisers, and drugs.
 Carbon – Carbohydrate foods all contain carbon, hydrogen, and oxygen, and cover a wide range of natural compounds such as sugar and starch. Potatoes, pasta, and rice are typical carbohydrate foods.
Graphite
 Carbon – This is the atomic structure of graphite. Like diamond, it is made only of carbon. Unlike diamond, however, the structure of graphite is in sheets. The bonds between the sheets are relatively weak, so that when pressure is applied, parts of the mineral flake off. That is what allows graphite to be used in pencils.
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