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How long will it take for a 64 gram sample to decay to 8 grams if the half life of the isotope is 5 hours?
50 grams to 12.5 grams is a reduction of 0.75, or an ending amount of 0.25. That is two half-lives, or twenty years, in this case. The equation of half-life is ...
AT = A0 2(-T/H)
... where A0 is the starting activity, AT is the ending activity at time T, and H is the half-life at units of T.
What else can I help you with?
If the half-life of a radioactive substance is 10 hours how long will it take for 50 percent of it to decay?
The half-life of a radioactive isotope is defined as the time taken for the isotope to decay to half of its initial mass. So to decay to 50 percent of its initial mass will take one half-life of the isotope. One half-life of the isotope is 10 hours so the time taken to decay is also 10 hours.
The half life of Rn-222 is 4 daysWhat was the original mass of a sample of this isotope remains after 21 hrs?
The half-life on 222Rn86 is 3.8235 days. A sample of this isotope will decay to 0.8533 of its original mass after 21 hours. AT = A0 2(-T/H) AT = (1) 2(-21/(24*3.8235)) AT = 0.8533
What is the half life of astatine?
Astatine has many isotopes, each with its own half life. The longest in my list is At209 at 8.1 hours, and At215 is listed at 0.1 ms. The shortest are just listed as 'short' reflecting the small quantities.
What is an atom's half-life?
The term half-life is one we apply to radioactive materials to talk about how quickly they decay. The half-life is the time it takes for half of a given sample of the unstable substance (whatever it may be) to undergo radioacitve decay. The way it works is quite simple, and though the numbers are statistically derived, they are pretty darn accurate. Let's look more closely.A sample of a radioactive nuclide (radiocarbon or carbon-14 for example) is made up of atoms with unstable nuclei. These nuclei will "fall apart" (decay radioactively) spontaneously, and each one can decay at any moment. What we don't know is when a givennucleus will decay. But if we watch a large number of these nuclei, we can count the decays across a period of time, and then come up with a rate of decay. We convert this into the length of time it takes for half of the given sample to decay. This length of time will be the half-life for that particular radionuclide. Each radionuclide has a unique half-life, as you might expect.A half-life is based on the decay rate of a particular isotope of a given element. It is a natural characteristic of that given radionuclide, and it is the amount of time it takes for a sample of it to decay to the point where half of it is gone and half the original sample remains. Use the links below to related questions to learn a little more.Drugs also have a half-life. Some drugs stay longer in the system, some disapate quickly. If the doctor wants to maintain a level of the drug in the body it maybe necessary to prescribe a dose every several hours or once or twice a day depending on how long the half-life of the drug is.From Wikipedia..The duration of action of a drug is known as its half life. This is the period of time required for the concentration or amount of drug in the body to be reduced by one-half. We usually consider the half life of a drug in relation to the amount of the drug in plasma. A drug's plasma half-life depends on how quickly the drug is eliminated from the plasma.Half life is the time duration in which half of the radioactive element would undergo decay. Suppose just for understanding purpose let us say half life is 3 hours.Say we have 4096 atoms freshNow after 3 hours half of this ie 2048 have got decayedIn the next 3 hours ie totally in 6 hours half of this ie 1024 would get decayed and 1024 would remainNow in the next 3 hours half of this ie 512 would get decayedIn the next 3 hours 256 and then 128, 64, 32, 16, 8 and so onBut in reality there would millions of atoms.
What is the half life of a radioactive substance if it takes 6 hours for 50 percent of it to decay?
That is the half-life - the 6 hours in this case.That is the half-life - the 6 hours in this case.That is the half-life - the 6 hours in this case.That is the half-life - the 6 hours in this case.
What is the amount of time it takes for three fourthsof a radioactive sample of an isotope of bromine to decay if the half life of the isotope is 16.5 hours?
It takes one half-life for half of the radioactive sample to decay. Since half of the sample has decayed after 16.5 hours, it will take another 16.5 hours for the remaining half to decay, totaling 33 hours to decay three fourths of the original sample.
Determine the amount of time it takes for three fourths of a radioactive sample of an isotope of bromine to decay the half-life of the isotope is 16.5 hours?
The half-life of the isotope is 16.5 hours, so it takes 16.5 hours for half of the sample to decay. To find the time it takes for three fourths of the sample to decay, you would calculate 2 half-lives (2 x 16.5 hours) as three fourths is equal to 1.5 times the original amount (1 + 0.5). Therefore, it would take 33 hours for three fourths of the sample to decay.
How much of a 100 gram sample would remain unchanged after 2 hours?
To determine how much of a 100 gram sample would remain unchanged after 2 hours, it is necessary to know the specific decay rate or change process of the sample. For example, if the sample undergoes a decay process with a known half-life, you can calculate the remaining amount using the formula for exponential decay. Without this information, it's impossible to provide an exact answer. In general, if no decay occurs, the entire 100 grams would remain unchanged.
If the half-life of a radioactive substance is 10 hours how long will it take for 50 percent of it to decay?
The half-life of a radioactive isotope is defined as the time taken for the isotope to decay to half of its initial mass. So to decay to 50 percent of its initial mass will take one half-life of the isotope. One half-life of the isotope is 10 hours so the time taken to decay is also 10 hours.
The half life of Rn-222 is 4 daysWhat was the original mass of a sample of this isotope remains after 21 hrs?
The half-life on 222Rn86 is 3.8235 days. A sample of this isotope will decay to 0.8533 of its original mass after 21 hours. AT = A0 2(-T/H) AT = (1) 2(-21/(24*3.8235)) AT = 0.8533
How much Cu-64 half-life about 12 hours would remain from a 2 mg sample after 12 hours?
1 mg
What is half life of a radioisotope if a g sample becomes g after 16 hours?
16 hours.
Manganese-56 is a beta emitter with a half-life of 2.6 hour. What is the mass of manganese-56 ina 1 mg sample of the isotope after 10.4?
After 10.4 hours, there would be 1/2^4 = 1/16 (0.0625) mg of manganese-56 left in the sample due to radioactive decay. Therefore, the mass of manganese-56 remaining in a 1 mg sample after 10.4 hours would be 0.0625 mg.
How long does it take for thallium to decay?
Thallium has several isotopes, with thallium-204 being stable, while thallium-201, which is commonly referenced in decay discussions, has a half-life of about 73 hours. Other isotopes, like thallium-202 and thallium-203, have half-lives of 12.3 days and 46.5 hours, respectively. The decay time varies depending on the specific isotope in question.
What is the half life of astatine?
Astatine has many isotopes, each with its own half life. The longest in my list is At209 at 8.1 hours, and At215 is listed at 0.1 ms. The shortest are just listed as 'short' reflecting the small quantities.
What is an atom's half-life?
The term half-life is one we apply to radioactive materials to talk about how quickly they decay. The half-life is the time it takes for half of a given sample of the unstable substance (whatever it may be) to undergo radioacitve decay. The way it works is quite simple, and though the numbers are statistically derived, they are pretty darn accurate. Let's look more closely.A sample of a radioactive nuclide (radiocarbon or carbon-14 for example) is made up of atoms with unstable nuclei. These nuclei will "fall apart" (decay radioactively) spontaneously, and each one can decay at any moment. What we don't know is when a givennucleus will decay. But if we watch a large number of these nuclei, we can count the decays across a period of time, and then come up with a rate of decay. We convert this into the length of time it takes for half of the given sample to decay. This length of time will be the half-life for that particular radionuclide. Each radionuclide has a unique half-life, as you might expect.A half-life is based on the decay rate of a particular isotope of a given element. It is a natural characteristic of that given radionuclide, and it is the amount of time it takes for a sample of it to decay to the point where half of it is gone and half the original sample remains. Use the links below to related questions to learn a little more.Drugs also have a half-life. Some drugs stay longer in the system, some disapate quickly. If the doctor wants to maintain a level of the drug in the body it maybe necessary to prescribe a dose every several hours or once or twice a day depending on how long the half-life of the drug is.From Wikipedia..The duration of action of a drug is known as its half life. This is the period of time required for the concentration or amount of drug in the body to be reduced by one-half. We usually consider the half life of a drug in relation to the amount of the drug in plasma. A drug's plasma half-life depends on how quickly the drug is eliminated from the plasma.Half life is the time duration in which half of the radioactive element would undergo decay. Suppose just for understanding purpose let us say half life is 3 hours.Say we have 4096 atoms freshNow after 3 hours half of this ie 2048 have got decayedIn the next 3 hours ie totally in 6 hours half of this ie 1024 would get decayed and 1024 would remainNow in the next 3 hours half of this ie 512 would get decayedIn the next 3 hours 256 and then 128, 64, 32, 16, 8 and so onBut in reality there would millions of atoms.
What is the half life of an isotope that decays to 50 percent of its original activity on 40.9 hours?
15 days
