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Carbon (6 C) has 14 known isotopes, from 8 C to 20 C as well as 22 C, of which 12 C and 13 C are stable. The longest-lived radioisotope is 14 C, with a half-life of 5.70(3) × 10 3 years. This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reaction 14 N + n → 14 C + 1 H. The most ...
15 isotopes of the element carbon are known - 2 of which are stable (12 C, 13 C), the others occur as unstable natural decomposition products (14 C) on or were artificially generated. The carbon radioisotope with the longest half-life (5700 years) is C-14, which also occurs in traces in nature.
Among the artificial isotopes, the longest-lived species is carbon-11, with a half-life of 20.334 minutes. The shortest-lived isotope is Carbon-8, with a half life of 2.0 x 10 -21 seconds. What are they Used For?
Element Carbon (C), Group 14, Atomic Number 6, p-block, Mass 12.011. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
1 sty 2018 · Stable carbon isotopes are commonly used for a wide range of applications in marine sciences and climate research. Applications include reconstructions of the global carbon cycle including short-term perturbations, chemostratigraphy, and tracing of water masses and surface water productivity in the modern and past ocean.
Useful stable isotopes include boron-10 (10B) used in boron neutron capture therapy for treating brain tumors and carbon-13 and carbon-12 (13C/12C) or oxy-gen-18 and oxygen-16 (18O/16O) to detect performance-enhancing drug use in sports, authenticity of foods, effects of climate change, and origins of contaminants in the environment.
Color-coded pie charts in each element cell display the stable isotopes and the relatively long-lived radioactive isotopes having characteristic terrestrial isotopic compositions that determine the standard atomic weight of each element.
