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What is the fraction of a sample of tritium that remains undecayed after fifty years?
After 50 years, approximately 50% of tritium will remain undecayed in a sample. Tritium has a half-life of about 12.3 years, which means that the amount of undecayed tritium decreases by half every 12.3 years.
What is the half life of the Radioisotope H3?
The half-life of the radioisotope tritium (H-3) is about 12.32 years. This means that it takes approximately 12.32 years for half of a sample of tritium to decay into helium-3.
What fraction of a radioactive sample decays after three half lives?
If I take a radioactive sample of 400 moles of an unknown substance and let it decay to the point of three half-lives I would have 50 moles left of the sample. 1/2 of what is left will decay in the next half-life. At the end of that half-life I will have 25 moles left of the unknown substance or 4/25.
Tritium has a half life of 12.3 years if 118mg escapes what percent of the spill will remian radioactive in 61.5 years?
After 61.5 years, five half-lives would have passed for tritium (12.3 years x 5 = 61.5 years). Each half-life reduces the amount of radioactive material by half. Therefore, after 61.5 years, 3.125% (0.5^5) of the initial 118mg of tritium would remain radioactive.
How long will tritium last?
The half-life of tritium is about 12.3 years, meaning it takes that much time for half of the tritium to decay. However, tritium can persist in the environment for a longer time due to its constant formation in the upper atmosphere and mixing in with water sources.
What is the fraction of a sample of tritium that remains undecayed after fifty years?
After 50 years, approximately 50% of tritium will remain undecayed in a sample. Tritium has a half-life of about 12.3 years, which means that the amount of undecayed tritium decreases by half every 12.3 years.
What is the half life of the Radioisotope H3?
The half-life of the radioisotope tritium (H-3) is about 12.32 years. This means that it takes approximately 12.32 years for half of a sample of tritium to decay into helium-3.
What percentage of a radioactive sample remains after 5 half-lives?
After 5 half-lives, 3.125% (or 1/2^5) of a radioactive sample remains. Each half-life reduces the sample by half, so after 5 half-lives, there is only a small fraction of the original sample remaining.
What part of a radioactive sample remains unchanged after 2 half lives?
After 2 half lives, 25% of the original radioactive sample remains unchanged. This is because half of the sample decays in each half life, so after 1 half life, 50% has decayed, and after 2 half lives, another 50% has decayed, leaving 25% unchanged.
How much of 8-gram sample of Hydrogen-3 would still be present after 12.3 years if the half life of a H-3 is 12.3 years?
If 12.3 years is the half-life of Tritium (H-3), then @ 12.3 years only half of the tritium should remain or 4 grams.
What fraction of a sample remains after three half lives?
An eighth remains.
How many half-lives would be necessary for a sample of parent isotopes to decay to the point that only one-half of the sample is composed of parent isotope?
One half life.
What fraction of a radioactive sample decays after three half lives?
If I take a radioactive sample of 400 moles of an unknown substance and let it decay to the point of three half-lives I would have 50 moles left of the sample. 1/2 of what is left will decay in the next half-life. At the end of that half-life I will have 25 moles left of the unknown substance or 4/25.
Why After three half-lives what fraction of a radioactive sample remains?
After three half-lives, only 1/8 (or 12.5%) of the original radioactive sample remains. This is because each half-life reduces the amount of radioactive material by half, so after three half-lives, you would have (1/2) * (1/2) * (1/2) = 1/8 of the original sample remaining.
What is the half life tritium?
The half-life of tritium is 12.32 years (12 years 3 months and 26-ish days).
How much cesium is left after 4 half-lives?
1/16 of the original sample of any unstable element remains after 4 half lives.
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
