Carbon dating formula

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Archaeologists use the exponential, radioactive decay of carbon 14 to estimate the death dates of organic material. The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles. Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon. At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues. When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon Experts can compare the ratio of carbon 12 to carbon 14 in dead material to the ratio when the organism was alive to estimate the date of its death.
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Carbon from Latin : carbo "coal" is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent —making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon is the 15th most abundant element in the Earth's crust , and the fourth most abundant element in the universe by mass after hydrogen , helium , and oxygen. Carbon's abundance, its unique diversity of organic compounds , and its unusual ability to form polymers at the temperatures commonly encountered on Earth enables this element to serve as a common element of all known life. It is the second most abundant element in the human body by mass about
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Carbon is the chemical element with the symbol C and atomic number 6 contains 6 protons in its nucleus. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. The most common isotope of carbon has 6 protons and 6 neutrons, and has an atomic mass of Its ground state electron configuration is 1s 2 2s 2 2p 2.
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Chlorofluorocarbons CFCs and hydrochlorofluorocarbons HCFCs are fully or partly halogenated paraffin hydrocarbons that contain only carbon C , hydrogen H , chlorine Cl , and fluorine F , produced as volatile derivative of methane , ethane , and propane. They are also commonly known by the DuPont brand name Freon. The most common representative is dichlorodifluoromethane R or Freon Many CFCs have been widely used as refrigerants , propellants in aerosol applications , and solvents. Because CFCs contribute to ozone depletion in the upper atmosphere , the manufacture of such compounds has been phased out under the Montreal Protocol , and they are being replaced with other products such as hydrofluorocarbons HFCs [1] including RA and Ra.
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