Dictionary definition carbon dating
Because the ratio of carbon 12 to carbon 14 present in all living organisms is the same, and because the decay rate of carbon 14 is constant, the length of time that has passed since an organism has died can be calculated by comparing the ratio of carbon 12 to carbon 14 in its remains to the known ratio in living organisms. Our Living Language : In the late 1940s, American chemist Willard Libby developed a method for determining when the death of an organism had occurred.
Symbol: C; atomic no.: 6; atomic wt.: 12.011; valency: 2, 3, or 4; relative density: 1.8--2.1 (amorphous), 1.9--2.3 (graphite), 3.15--3.53 (diamond); sublimes at 3367±25°C; boiling pt.: 4827°circulation of carbon between living organisms and their surroundings.
Carbon dioxide from the atmosphere is synthesized by plants into plant tissue, which is ingested and metabolized by animals and reduced to carbon dioxide again during respiration and decaya colourless odourless incombustible gas present in the atmosphere and formed during respiration, the decomposition and combustion of organic compounds, and in the reaction of acids with carbonates: used in carbonated drinks, fire extinguishers, and as dry ice for refrigeration.
Formula: CO2a colourless slightly soluble volatile flammable poisonous liquid commonly having a disagreeable odour due to the presence of impurities: used as an organic solvent and in the manufacture of rayon and carbon tetrachloride.
Formula: CS2a black silky thread of pure carbon made by heating and stretching textile fibres and used because of its lightness and strength at high temperatures for reinforcing resins, ceramics, and metals, esp.
Ninety-nine percent of these also contain six neutrons.