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Yes. Well it depends on how much you start with. Numerically the exponential decay curve approaches zero without touching it, but in reality, matter is composed of elemental particles. Consider that at the end of 10 half lives, you had a single atom of Carbon14. So at 9 half lives, there should be 2 Carbon14 atoms. If you keep going, then at the start, you had 1024 atoms. And that is a teeny tiny amount.
To put in perspective, if you have one mole of Carbon 14 (that is 14 grams) But there are 6.023 x 10^23 atoms. It would take 79 half-lives to get down to just a single atom of Carbon 14. In reality, it is a little more complex than this, but this should put it in perspective.
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How many half-lives have passed for 50 percent of the original radioactive material?
One half-life.
The half-life of 220Fr is 27.5 sec Calculate the fraction of 220Fr that remains after 1.0 min?
If the half-life of an isotope is 27.5 sec, then one minute is 2.18 half-lives. Radioactive decay is an inverse exponential process, base two, so 2-2.18, or 0.2207 of the original material would remain after one minute. This is half-life mathematics that applies to all radioactive decay. This answer does not confirm nor deny that the half-life of 220Fr87 is 27.5 seconds.
What property of half-lives makes radioactive material so problematic?
Radioactivity is limited by the natural decay-time to stable isotopes and there is no known way to shorten a half-life.
What percentage of a radioactive sample remains after 5 half-lives?
3.1 %
Which statement is true about half-lives a Different atoms of the same element have different half-lives. b Each radioactive isotope has its own half-life. c All radioactive nuclides of an element?
The correct answer is: Half-lives are not affected by temperature.
How much parent material will be left after five half-lives?
Only 1/32 of the original radioactive material will remain. (½)5 = 1/32
After three half-lives what fraction of a radioactive sample will remain?
Approx 1/8 will remain.
What fraction of a radioactive sample remains after three half-lives?
Not sure what you mean by "had-lives". After 3 half lives, approx 1/8 would remain.
What percentage of a radioactive element will remain after seven half lives?
1/27 = 1/128 = 0.78125%
After 6 half-lives What percentage of a radioactive sample remain?
After 6 half lives, the remaining will be (1/2)6 i.e 1/64 th of the initial amount. Hence by percentage it would be 1.5625 %
What fraction of a radioactive nuclei remain after p half lives?
The remainder is 2-p or 0.5p of the original amount.
How many years will it take for one half of the original amount of material to decay?
If you are referring to a radioactive material, that will depend on the material. Different things have very different half-lives.
How many half-lives have passed for 50 percent of the original radioactive material?
One half-life.
How many half-lives have passed in a rock containing one eighth of the original radioactive material and seven eighths of the daughter product?
3 half-lives
How long does it takes a radioactive material to decay?
Nuclear explosions produce both immediate and delayed destructive effects. Immediate effects (blast, thermal radiation, prompt ionizing radiation) are produced and cause significant destruction within seconds or minutes of a nuclear detonation. The delayed effects (radioactive fallout and other possible environmental effects) inflict damage over an extended period ranging from hours to centuries, and can cause adverse effects in locations very distant from the site of the detonation. Further reading: http://nuclearweaponarchive.org/Nwfaq/Nfaq5.html http://en.wikipedia.org/wiki/Nuclear_fallout
A sample of a radioactive element has a mass of 80 g. How much parent and daughter materials are in the sample after two half-lives?
A half-life is the amount of time it takes for half of the material to decay. So if you started with 80g After 1 half-life you would have 40 g After 2 half-lives you would have 20 g After three half-lives you would have 10 g
The half-life of 220Fr is 27.5 sec Calculate the fraction of 220Fr that remains after 1.0 min?
If the half-life of an isotope is 27.5 sec, then one minute is 2.18 half-lives. Radioactive decay is an inverse exponential process, base two, so 2-2.18, or 0.2207 of the original material would remain after one minute. This is half-life mathematics that applies to all radioactive decay. This answer does not confirm nor deny that the half-life of 220Fr87 is 27.5 seconds.
