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Carbon is also found in many compounds including carbon dioxide in the Earth's atmosphere and dissolved in the oceans and other major bodies of water. It is used for fuel in the form of coal, methane gas, and crude oil (which is used to make gasoline).
Hydrocarbons that form many fuels such as coal, natural gas, and petroleum also contain carbon. It is used to make all sorts of materials including plastics and alloys such as steel (a combination of carbon and iron).
Carbon also has the highest melting point of all the elements. It is found in its allotropic forms of diamond, graphite, and amorphous carbon throughout the world. Carbon is used in some way in most every industry in the world.
Asked by: William Baker Carbon 14 (C14) is an isotope of carbon with 8 neutrons instead of the more common 6 neutrons.
It is unstable, and scientists know that it radioactively decays by electron emission to Nitrogen 14, with a half life of 5730 years.
As a result it is always undergoing natural radioactive decay while the abundances of the other isotopes are unchanged.
Carbon-14 is most abundant in atmospheric carbon dioxide because it is constantly being produced by collisions between nitrogen atoms and cosmic rays at the upper limits of the atmosphere.