most common isotope isotope of nitrogen has rs and mass numbers of the acers in
ID: 95101 • Letter: M
Question
most common isotope isotope of nitrogen has rs and mass numbers of the acers in research on the s structure? ater molecules would be Fluorine atom Potassium atom 14. Interpreting Data As discussed in the text and shown in Figure 2.17, radiometric dating can be used to determine the age of biological materials. The calculation of age depends on the half-life of the radioisotope under consideration. For example, carbon-14 makes up about 1 part per trillion of naturally occurring carbon. When an organism dies, its body contains 1 carbon-14 atom per tillion total carbon atoms. After 5,700 years (the half-life of carbon-14), its body contains one-half as much carbon-14; the other half has decayed and is no longer present. French scientists used carbon-14 dating to determine the age of prehistoric wall paintings in the Niaux caves. They determined that the paintings were made using natural dyes approximately 13,000 years ago. Using your knowledge of radiometric dating, how much carbon-14 must the scientists have found in the cave paintings to support this result? Express your answer in both percentage of carbon-14 remaining and in parts of carbon-14 per trillion. reaction? 2) combine to form carbon e to form sodium chloride. n gas to gas to form water. ey don't understand what aExplanation / Answer
Answer:
Carbon 14 is a naturally occuring radioactive isotope of carbon. 14 number is made up of 6 protons and 8 neutrons which makes the nucleus(6+8=14) of the atom. Its natural abundance 1 part per trillion.
Carbon 14 decays to nitrogen -14 by beta decay.A gram of carbon containing 1 atom of carbon-14 per 1012 atoms will emit 0.40 beta particles per second. The primary natural source of carbon-14 on Earth is cosmic ray action on nitrogen in the atmosphere, and it is therefore a cosmogenic nuclide.
14C => 14N + beta
The age of carbonaceous materials upto 60000 yrs old, could be determined by radiometric dating using C14 isotope.
By measuring the C14 concentration or residual radioactivity of a sample whose age is not known, it is possible to obtain the countrate or number of decay events per gram of Carbon.
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