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The half-life of carbon-14 is 5730 years. How long will it take for the number of carbon-14 nuclei in a sample to drop to a quarter of the original number?
It will take two half-lives for the number of carbon-14 nuclei to drop to a quarter of the original number. Since the half-life of carbon-14 is 5730 years, it will take 2 * 5730 years = 11460 years for this to occur.
If a sample that originally contain 10 grams of C14 has gone through two half-lives of Decay how much C14 will be left?
2.5
What is the c-14 c-12 ratio used to date once living organisms?
It is because living organisms absorb C14 from their environment. After death, they are no longer capable of absorbing any more C14. So, at the time of death, the C14 : C12 ratio is fixed. C14 undergoes radioactive decay (into C12) so the C14 : C12 ratio declines and that can be used as a measure of the time since death.
After one half-life what percent of the original uranium remains?
By definition, 50%. Half life is the time for half of the original sample to decay.
How do you use half life in a sentence?
Uranium has a high half-life, so it changes very quickly.
Arrange in the order of half life s35 p32 H3 C14?
The order of half-life from shortest to longest is: P32 (phosphorus-32), S35 (sulfur-35), C14 (carbon-14), and H3 (tritium).
What half-life of C14 is 5730 years. What fraction of the original C14 would you expect to be present in a fossil that is 28650 years old?
1/32 of the original amount.
The half-life of C14 is 5730 years. What fraction of the original C14 would you expect to be present in a fossil that is 28650 years old?
There would be 1/32 left.
What fraction of the original c14 would you expect to be present in a fossil that is twenty eight thousand six hundred and fifty years old?
The half-life of C14 is 5730 years so the given period is 5 half-lives. You should, therefore, expect approx 2-5 = 0.03125 of the original C14 to remain.
The half-life of carbon-14 is 5730 years. How long will it take for the number of carbon-14 nuclei in a sample to drop to a quarter of the original number?
It will take two half-lives for the number of carbon-14 nuclei to drop to a quarter of the original number. Since the half-life of carbon-14 is 5730 years, it will take 2 * 5730 years = 11460 years for this to occur.
How old would the turtle be if it only had 6.25 percent of the carbon 14 that a living turtle had today?
The half life of carbon 14 is 5730 years. If the turtle has 6.25 the carbon 14 of a modern turtle, assuming that the ancient turtle had the same amount of C14 as the modern turtle when the ancient turtle died, the ancient turtle died at around 4 half lives of C14 ago. ln(.0625)/ln(.5)=4. So the turtle died approximately 22920 years ago Start with 100 percent of the C14. 100 Every time a half life passes, the amount of C14 is reduced by half. so 100*(1/2)^x x is the number of half lives that have passed. 100*(1/2)^4 = 6.25
How much c14 would be left after 10 half lives?
After 10 half lives, only ( \left(\frac{1}{2}\right)^{10} = \frac{1}{1024} ) or approximately 0.098% of the original amount of C14 would be left.
If a sample that originally contain 10 grams of C14 has gone through two half-lives of Decay how much C14 will be left?
2.5
A researcher who uses carbon dating on anciet items?
The half life of C14 is about 5700 years, so items that are a few multiples of this time are suitable for carbon14 dating. Most archaeological items are suitable, and some young fossils.
What are the release dates for C14 - 2013?
C14 - 2013 was released on: USA: 30 October 2013 (limited)
What is the use of C-14?
Its use in Nature by Nature is not known. The atom decays with a half life of something like 14,000 years and is present in all carbon in the earth at a certain percentage. Thus a gram of any organic substance (an organic substance is one that possess carbon and oxygen; carbon is present in food (polysaccharides, fats, sugars, proteins; and in all tissues of the body and it is present at the % that it is present on earth thruout life. When an animal or plant dies, it stops taking in C14 or any carbon when it dies. As time goes on, the % of Carbon in the dead plant of animal that is C14 decreases as C14 decays by ejection of an electron (beta decay). As this happens, the 5 of total carbon that is radioactive decreases continuously, Scientists can determine how long ago the animal died by determining how much C14 radioactivity is in a gram of that organisms carbon. If the organism died 14,000 years ago, the % would be about half of that in the earths environment (then and now, that doesn't change). Aside from its use for that calculation, C14 has no known "use" but is a product of natural radioactive decay and plays a central role in universal homeostasis.
What are th uses of c14?
Carbon-14 is used for radioactive dating. Since its half-life is about 5000 years, it can be used a) to date items that contain a reasonable amount of carbon (especially remains of living beings), and b) up to a limit of about 50,000 years.
