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When three-quarters of a radioactive isotope has decayed to become the stable daughter product how many half lives have occured?
When three-quarters of a radioactive isotope has decayed, it means that 1/4 (or 25%) of the original isotope remains. This corresponds to 2 half-lives, because each half-life halves the amount of radioactive material remaining.
What is a Radioactive Parent?
Radio active parent elements decay to stable daughter elements i.e. the radio active parent Potassium 40 decays to Argon 40 Each radioactive isotope has it's own half life A half life is the time it takes for the parent radioactive element to decay to a daughter product, Potassium 40 decays to Argon 40 with a half life of 1 1/4 billion years. Therin lies the problem of storing nuclear waste
Can the half life of a radioactive isotope decrease as the isotope decays?
No, the half-life of a radioactive isotope is a constant property of that particular isotope and does not change as it decays. The half-life is defined as the time it takes for half of the atoms in a sample to decay. Once set, the half-life remains constant regardless of how many atoms have decayed.
What fraction of the parent isotope will be left after 30 minutes?
It depends on the half life of the isotope. If the half life is, for example, 10 minutes, then 1/8 of the parent isotope will remain (30/10 = 3; 1/2^3 = 1/8). Essentially, to work out the remaining fraction, you firstly divide the period of time by the half life (the answer in this case is X), and then do 1/2 to the power of x.
How much of a radio active parent isotope remains after one half life has pass?
Half the original amount.
Which percentage replaces letter x of the parent isotope per half-time of a radioisotope?
The percentage of the parent isotope remaining after one half-life of a radioisotope is 50%. This means that half of the parent isotope has decayed into the daughter isotope.
If an Isotope has a 75 year half life how long until the parent isotope has decayed to 1 percent of the initial number?
It would take approximately 525 years for the parent isotope to decay to 1 percent of the initial number. This is calculated by multiplying the half-life of the isotope by the natural logarithm of 100 (which is -4.605), as it represents the fraction remaining after one half-life.
When three-quarters of a radioactive isotope has decayed to become the stable daughter product how many half lives have occured?
When three-quarters of a radioactive isotope has decayed, it means that 1/4 (or 25%) of the original isotope remains. This corresponds to 2 half-lives, because each half-life halves the amount of radioactive material remaining.
In a time equal to two half-lives of a radioactive isotope would you expect all of that isotope to have decayed?
No. In two half-lives, a radioactive isotope will decay to one quarter of its original mass. In one half-life, one half of the mass decays. In the next half-life, one half of the remaining mass decays, and so on and so forth. At each half-life point, you would see 0.5, 0.25, 0.125, 0.0625, etc. remaining. The logarithmic equation is... AT = A0 2(-T/H)
What is the time it takes for the amount of a radioactive parent material to decrease by one-half called?
The time it takes for the amount of a radioactive parent material to decrease by one-half is called the half-life. It is a characteristic property of each radioactive isotope and is used to determine the rate of decay.
The daughter isotope is 87.5 percent if the half-life of the isotope is 150 million years how old is the sample?
To find the age of the sample, we need to determine how many half-lives have passed based on the daughter isotope percentage. Since the daughter isotope is 87.5% present, it means 12.5% has decayed from the parent isotope. Since 1 half-life would result in 50% decay, we can divide 12.5% by 50% to get 0.25 half-lives. Therefore, the sample is approximately 150 million years (half-life) x 0.25 = 37.5 million years old.
What is the term for the time required for half of a parent isotope to decay into a daughter product?
it's half life
Among the following radioactive parent isotopes, which has the shortest half-life?
The radioactive parent isotope with the shortest half-life among the options provided.
What is a Radioactive Parent?
Radio active parent elements decay to stable daughter elements i.e. the radio active parent Potassium 40 decays to Argon 40 Each radioactive isotope has it's own half life A half life is the time it takes for the parent radioactive element to decay to a daughter product, Potassium 40 decays to Argon 40 with a half life of 1 1/4 billion years. Therin lies the problem of storing nuclear waste
Can the half life of a radioactive isotope decrease as the isotope decays?
No, the half-life of a radioactive isotope is a constant property of that particular isotope and does not change as it decays. The half-life is defined as the time it takes for half of the atoms in a sample to decay. Once set, the half-life remains constant regardless of how many atoms have decayed.
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 the parent isotope will be left after 30 minutes?
It depends on the half life of the isotope. If the half life is, for example, 10 minutes, then 1/8 of the parent isotope will remain (30/10 = 3; 1/2^3 = 1/8). Essentially, to work out the remaining fraction, you firstly divide the period of time by the half life (the answer in this case is X), and then do 1/2 to the power of x.
