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What percentage of a radioactive sample remains after 5 half-lives?
Wiki User
∙ 11y ago
3.1 %
Wiki User
∙ 11y ago
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What must be true for radioactive dating to be possible with a certain sample?
The sample must contain radioactive elements.
What does the half life of a radioisotope correspond to?
The length of time required for half of a sample of radioactive material to decay
Why is a sample of uranium compound found to be losing mass gradually?
The cause is the radioactive decay of uranium isotopes.
Why do scientist use radioactive dating?
To figure out how old something is based how long it takes elements in the sample to decay.
What does the half life of a radioisotopes indicate?
The half life of a radioisotope indicates the rate of decay for a radioactive sample
What is the significance of a half life of a radioisotope?
It tells what fraction of a radioactive sample remains after a certain length of time.
Why After three half-lives what fraction of a radioactive sample remains?
The fraction that remains is 1/8.
After three half-lives what fraction of a radioactive sample remains?
1/8 of the original amount remains.
What fraction of a radioactive sample remains after three half - life?
It is 1/8 .
. If the half-life of an unstable isotope is 10000 years and only 18 of the radioactive parent remains in a sample how old is the sample?
30,000
As a sample of a radioactive element decays its half-life?
No, the half life remains exactly the same throughout
What does the half life of a radioisotope represent?
It tells what fraction of a radioactive sample remains after a certain length of time.
What must be true for radioactive dating to be possible with a certain sample?
The sample must contain radioactive elements.
What percentage of the ca remains unprecipitated?
= What percentage of Ca^2+ remains unprecipitated? = A 75.0 mL sample of 1.48×10^−2M Na2SO4(aq) is added to 75.0 mL of 1.22×10^−2M Ca(NO3)2(aq) what percentage of Ca^2+ remains unprecipitated??
What does the half life of a radioisotope correspond to?
The length of time required for half of a sample of radioactive material to decay
How can half lives be shortened?
Half life of an element can't be changed.. It is a characteristic of a radioactive element which is independent of chemical and physical conditions.. Half life is that time in which half of radioactive sample( i.e., a radioactive element) decomposes. So no matter what amount you take half life of an element remains same.
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 %
