Carbon-12
the isotopic carbon atom that comprises 99 percent of naturally occurring carbon, and that since 1961 has been used as the standard for atomic weight by representing a unit of 12.00000.
carbon 12
A stable isotope of carbon, having six protons and six neutrons in the nucleus. Carbon 12 makes up most naturally occurring carbon.
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- Carbon-13
the stable isotope of carbon having an atomic mass number 13, used as a tracer.
- Carbon-14
radiocarbon (def 1). Historical Examples The case of carbon-14 is an example of a permanent man-made modification of the environment. Atoms, Nature, and Man Neal O. Hines carbon 14 A naturally occurring radioactive isotope of carbon having six protons and eight neutrons in the nucleus. Carbon 14 is important in dating archaeological and biological remains […]
- Carbon-14 dating
radiocarbon dating.
- Carbon-arc
an electric arc between two carbon electrodes, used mainly for lighting, as in an arc light for a motion-picture projector, or for intense heating, as in the cutting and welding of metals. Historical Examples After many experiments with platinum, he abandoned that material in favor of the carbon-arc in vacuo. Notable Events of the Nineteenth […]
- Carbon-bisulfide
carbon disulfide. a clear, colorless or faintly yellow, poisonous, flammable liquid, CS 2 , used chiefly in the manufacture of cellophane, viscose rayon, and pesticides and as a solvent for fats, resins, and rubber.