carbon 14 in English
After the organism dies and becomes a fossil, carbon-14 continues to decay without being replaced. To measure the amount of radiocarbon left in a fossil.
Use "carbon 14" in a sentence
1. Carbon 14 synonyms, Carbon 14 pronunciation, Carbon 14 translation, English dictionary definition of Carbon 14
2. Notes for Carbon 14 Carbon 14 is used in a common form of …
3. Carbon 14 is a direct product of photosynthesis
4. Carbon 14 is a common isotope of carbon
5. Carbon 14 is produced when neutrons bombard atoms of nitrogen
6. If Carbon 14 is being produced in the upper atmosphere by cosmic ray bombardment at a constant rate, then Carbon 14 must be accumulating in the world
7. Carbon-14 is continuously generated by cosmic rays in the atmosphere.
8. Carbon 14 dating can accurately determine the age period of these trees.
9. I injected carbon-14, the radioactive gas, into the bag of birch.
10. A Carbon 14 atom contains six protons, six electrons, and eight neutrons
11. Carbon-14 A by-product of cosmic rays The nucleus of Carbon 14 contains 6 protons and 8 neutrons, as opposed to the 6 and 6 found in ordinary carbon 12
12. And there is also Carbon 14, which consists of six protons and eight neutrons
13. Wise to accept carbon-14 dates only when they can be calibrated with historical materials
14. Well, that would be the case if Carbon 14 wasn't unstable and degrading just as fast
15. A calculation or (more accurately) a direct comparison of carbon-14 levels in a sample, with tree ring or cave-deposit carbon-14 levels of a known age, then gives the wood or animal sample age-since-formation.
16. Remember that it is the ratio of carbon 14 to carbon 12 that fixes the specific activity.
17. A table and a graph in the report show the production of carbon 14 from typical flares.
18. It turns out that the production and degradation of Carbon 14 is going on at the same rate.
19. From a chemical point of view, there is no substantive difference between carbon 12, carbon 13, and Carbon 14.
20. 27 The carbon 14 atoms oxidise to carbon dioxide which gets blown about and mixed up with lower atmosphere.
21. The imbalance makes Carbon 14 a radioisotope with a half-life of 5,700 years, and an emitter of beta particles.
22. Carbon-14 is produced in the upper layers of the troposphere and the stratosphere by thermal neutrons absorbed by nitrogen atoms.
23. His most novel contribution was to exploit the post-war availability of simple Carbon-14 molecules to study the biosynthesis of many alkaloids.
24. Libby realized that when plants and animals die they cease to ingest fresh carbon-14, thereby giving any organic compound a built-in nuclear clock.
25. Carbon 14 a radioactive isotope of carbon, atomic mass 14, having a half-life of 5730 years; used as a tracer in cancer and metabolic research
26. Dan Gill answers: “To test whether Warren’s Shaft was in fact a natural sinkhole, we analyzed a fragment of calcareous crust from its irregular walls for carbon-14.
27. Carbon 14 definition is - a heavy radioactive isotope of carbon of mass number 14 used especially in tracer studies and in dating old materials (such as archaeological and geologic specimens).
28. The amounts of carbon 14 and carbon 12, as well as their ratio, which determines the specific activity, would not have been changed merely by the fall of the water.
29. Since the inventories of carbon 14 and carbon 12 are independent of each other, it is possible to postulate values that would account for the excessive ages reported on old samples.