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Depends on how many grams you started with, but obviously if half decays, half is left.
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∙ 15y ago
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How much of the radioactive element will be left one billion years from now?
That depends on the "half-life" of that particular radioactive element, which the question forgot to state. They're all different. Various radioactive elements have half-lives ranging from microseconds to millions of years.
If a radioactive element half life is 500000 years given 20 grams of the element how much is left after 4 half lives?
Just divide the original amount by 2, 4 times: 10; 5; 2.5; 1.25. The final number is the answer.
A particular element has a half life of 27 daysafter 54 days how much of the radioactive material is left?
The half life is the time it takes for half the atoms in a given sample to decompose. Knowing this then after 27 days there is half the amount left. After 54 days then there is half that half left so that's a quarter.
How much parent material will be left after five half-lives?
Only 1/32 of the original radioactive material will remain. (½)5 = 1/32
How much time has passed if carbon -14 has a half life of 5730 years and 2 half lives have passed?
By observing how much decays in a few days, or in a year, and extrapolating.
How much cesium is left after 4 half-lives?
1/16 of the original sample of any unstable element remains after 4 half lives.
How much darmstadtium is left in the world?
Darmstadtium is an artificial chemical element, obtained only in quantities of some atoms with very short half lives.
How much of the radioactive element will be left one billion years from now?
That depends on the "half-life" of that particular radioactive element, which the question forgot to state. They're all different. Various radioactive elements have half-lives ranging from microseconds to millions of years.
How much of an 8 gram sample is left after 3 half lives?
2.66666666666667 grams
If a sample that originally contain 10 grams of C14 has gone through two half-lives of Decay how much C14 will be left?
2.5
If a radioactive element half life is 500000 years given 20 grams of the element how much is left after 4 half lives?
Just divide the original amount by 2, 4 times: 10; 5; 2.5; 1.25. The final number is the answer.
How much c14 would be left after 10 half lives?
After 10 half lives, only ( \left(\frac{1}{2}\right)^{10} = \frac{1}{1024} ) or approximately 0.098% of the original amount of C14 would be left.
A particular element has a half life of 27 daysafter 54 days how much of the radioactive material is left?
The half life is the time it takes for half the atoms in a given sample to decompose. Knowing this then after 27 days there is half the amount left. After 54 days then there is half that half left so that's a quarter.
Radium-226 has a half-life of 1602 years. If you start out with 15 grams of radium-226 how much will be left after 3 half-lives?
1.875g
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
What percentage of a radioactive element will be left after 1 half-life?
Half life is pretty much self explanatory in that after they go through 1 half life half of the radioactive decay remains. 1/2 x 1/2 x 1/2 = 1/8 = 0.125 = 12.5% or you can divide 100% by 2, 3 times and you'll get 12.5%
A particle element has a half-life of 27 days after 54 days have elapsed how much of the radioactive material is left is called?
54 days is 2x27. After one cycle of a half life (27 days), one-half of the substance would be left. After a second cycle of a half life (27 more days, for a total of 54), one-half of one-half is left, or one-fourth.
