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The half-life of actinium 227 is 21.772 years After 50 years how much of a 1500 g sample will remain radioactive?
Wiki User
∙ 14y ago
Approx. 313 grams
Wiki User
∙ 14y ago
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What is the use of measuring the activity of a radioactive isotope in a sample to determine its age?
radioactive dating
How would you distinguish a sample of peat from a sample of mudstone that contains fossil plant fragments?
Peat would remain largely unconsolidated. Mudstone is a rock.
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?
About 33 hours
How much cesium would remain from a 10 g sample after 6 years?
You must know the half life of Caesium to calculate this.
What three characteristics do geologists use to identify a rock sample?
Three characteristics that geologists use to identify a rock sample is color, hardness and streak. They can also check for other physical properties such as if there is a taste, if it is radioactive or if it gives off an odor.
What is the time needed for half of a sample of a radioactive isotope to break down to form daughter isotopes called?
halflife
After three half-lives what fraction of a radioactive sample will remain?
Approx 1/8 will remain.
How does the length of the half-life of the element correspond to the radioactivity of the element?
The length of time required for half of a sample of radioactive material to decay
How much of an 800-gram sample of potassium-40 will remain after 3.9109 years of radioactive decay?
100 grams
How much cesium would remain from a 10g sample after 4 years?
I suppose that you think to the radioactive isotope Cs-17; After 4 years remain 9,122 g.
How much of an 800-gram sample of potassium-40 will remain after 3.9 X 109 years of radioactive decay?
100 grams
What happens to a radioactive material over time?
It disintegrates into its daughter nuclei that are much more stabler than the radioactive nuclei. If a sample of radioacictive material is left it will decay into another element over a period of time. Note that complete decay is not possible. A fraction of the original radioactive material will always remain in the sample.
How long will it take half of a radioactive sample to decay?
The length of time depends on the element and isotope, but the point at which half of the sample has decayed is known as the half-life.
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
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.
How many milligrams of a 15.0 mg sample of radium-226 remain after 6396 years if the half-life of radium-226 is 1599?
One sixteenth of a gram. 1st halflife- 1/2 gram 2nd, 1/4 3rd 1/8th 4th halflife, 1/16th
