Dictionary definition carbon dating


23-Jul-2018 18:28

a nonmetallic element existing in the three crystalline forms: graphite, diamond, and buckminsterfullerene: occurring in carbon dioxide, coal, oil, and all organic compounds.

The isotope carbon-12 has been adopted as the standard for atomic wt.; carbon-14, a radioisotope with a half-life of 5700 years, is used in radiocarbon dating and as a tracer.

Libby was awarded the Nobel Prize in chemistry for his work in 1960.

Carbon dioxide in the atmosphere contains a constant amount of carbon-14, and as long as an organism is living, the amount of carbon-14 inside it is the same as the atmosphere.

Radioactive carbon-14 is continually formed in the atmosphere by the bombardment of cosmic ray neutrons on nitrogen-14 atoms.

After it forms, carbon-14 naturally decomposes, with a half-life of 5,730 years, through beta-particle decay.

This technique works well for materials up to around 50,000 years old.

Each radioactive isotope decays by a fixed amount, and this amount is called the half-life.

dictionary definition carbon dating-3

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Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that This is the British English definition of carbon dating. Change your default dictionary to American English. Open Dictionary Festschrift a volume of articles, essays, etc., contributed by many authors in honor of a colleague, usually published on the occasion of their retirement, an important anniversary and the like add a word Blog A must for anyone with an interest in the changing face of language.

in turbine blades and for fishing rodsa microphone in which a diaphragm, vibrated by sound waves, applies a varying pressure to a container packed with carbon granules, altering the resistance of the carbon.

A current flowing through the carbon is thus modulated at the frequency of the sound wavesa colourless odourless poisonous flammable gas formed when carbon compounds burn in insufficient air and produced by the action of steam on hot carbon: used as a reducing agent in metallurgy and as a fuel.

Scientists often use the value of 10 half-lives to indicate when a radioactive isotope will be gone, or rather when a very negligible amount is still left.

This is why radiocarbon dating is only useful for dating objects up to around 50,000 years old (about 10 half-lives).

a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14; believed to be reliable up to 40,000 years Familiarity information: CARBON DATING used as a noun is very rare.