c+radiocarbon+dating

=__Isotope and Radioactivity__= = = =Name of radioactive isotope/electromagnetic radiation/scientist:= = = Radioactive isotope = = =Explanation of interesting facts: (how used/works.experiments/discoveries)=
 * 1) Radiocarbon dating is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 to determine the age of carbonaceous materials up to about 58,00 to 62,00 years.
 * 2) When plants fix atmospheric carbon dioxide into organic mater during photosynthesis they incorporate a quantity of 14C that approximately matches the level of this isotope in the atmosphere.
 * 3) After plants die or they are consumed by other organism ( for example, by humans or other animals) the 14C fraction of this organic material declines at a fixed exponential rate due to the radioactive decay of 14C.
 * 4) Comparing the remaining 14C fraction of a sample to that expected from atmospheric 14 C allows age of of the sample to be estimated.

=3 Advantages of using the radioactive isotope/radiation/benefits of discovery=

1.It was developed by J.R. Arnold and W.F. Libby in 1949, and has become an indispensable part of the archaeologist's tool kit since.

2.Radiocarbon, or Carbon-14, dating is probably one of the most widely used and best known absolute dating methods.

3.Its development revolutionized archaeolgy by probiding a means of dating deposits independent of artifact and local stratigraphic sequences, this allowed for the establishment of world wide chronologies.

=3 Disadvantages of using the radioactive isotope/radiation/discovery:= 1.Many Christians have been led to distrust radiometric dating and are completely unaware of the great number of laboratory measurements that have shown these methods to be consistent.

2.When an organism dies it stops taking in carbon, so the amount of carbon-14 in its tissues steadily decreases, but because carbon-14 decays at a constant rate, the time since an organism died can be estimated by measuring the amount of radiocarbon in its remains.

3.

=Is the radioactive isotope/radiation/discovery still used today? Explain=

Yes it is still used today by chronometric technique in archaeology.

=References= Add your useful link to the resource page as well as this template __//http://en.wikipedia.org/wiki/Radiocarbon_dating//__ __//http://id-archserve.ucsb.edu/anth3/courseware/Chronology/08_Radiocarbon_Dating.html//__ __//http://www.asa3.org/ASA/RESOURCES/WIENS.html//__ __//http://www.answers.com/topic/radiocarbon-dating//__

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