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The half of iodine-125 is 60 days.What fraction of iodine-125 nuclides would be left after 360 days?
Assuming that "half" refers to "half-life", 360/60 = 6 so fraction left = 1/26 = 1/64
A rope is cut in half and half is discarded From the remaining half 1 quarter is cut off and discarded What fraction of the original rope is left?
3/8
How much Cu-61 (half-life about 3 hours) would remain from 2 mg sample after 6 hours?
6 hours = 2 half lives, thus 25 % would remain. 0.25 x 2 mg = 0.5 mg.Done another way...fraction remaining = 0.5^n where n = number of half lives = 6hr/3hr = 2fraction remaining = 0.5^2 = 0.250.25 x 2 mg = 0.5 mg
What fraction of U-238 atoms present at 1 half-life remain after 2 half-lives?
1/2 (50%) of them.
What is 0.62 and a half as a fraction?
0.62 and a half as a fraction is 5/8.
What fraction of a radioisotope is remaining if it undergoes six half-lives?
If a radioisotope undergoes six half-lives, only (1/64) or (0.015625) of the original radioisotope remains, because half of the remaining material decays at each half-life.
How long will it take for a 12.0-g sample of iodine-131 to decay to leave a total of 1.50 g of the isotope The half-life of iodine-131 is 8.07 days?
To solve this problem, you can use the formula for radioactive decay: N(t) = N0 * (1/2)^(t/T), where N(t) is the amount of the isotope remaining at time t, N0 is the initial amount, t is the elapsed time, and T is the half-life. Plugging in the values: 1.50 g = 12.0 g * (1/2)^(t/8.07), solve for t to find the time it takes for the iodine-131 to decay to 1.50 g.
What percentage of a radioactive sample remains after 5 half-lives?
After 5 half-lives, 3.125% (or 1/2^5) of a radioactive sample remains. Each half-life reduces the sample by half, so after 5 half-lives, there is only a small fraction of the original sample remaining.
After three half-lives what percent of the radioactive isotope is remaining?
After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.
Why After three half-lives what fraction of a radioactive sample remains?
After three half-lives, only 1/8 (or 12.5%) of the original radioactive sample remains. This is because each half-life reduces the amount of radioactive material by half, so after three half-lives, you would have (1/2) * (1/2) * (1/2) = 1/8 of the original sample remaining.
How much hydrogen-3 will remain after 60 years if the original sample have a mass 80.0 g and a the half-life of hydrogen-3 is 12 years?
After 60 years, there will be 2.5 grams of hydrogen-3 remaining from the original 80.0 grams sample. This is calculated by dividing the time elapsed by the half-life multiple times (60 years ÷ 12 years = 5 half-lives, 1/2^5 = 1/32). Multiplying 80.0 grams by 1/32 gives 2.5 grams remaining.
The half of iodine-125 is 60 days.What fraction of iodine-125 nuclides would be left after 360 days?
Assuming that "half" refers to "half-life", 360/60 = 6 so fraction left = 1/26 = 1/64
What is the amount of the original carbon-14 remaining after two half lives?
After two half lives, 25% of the original carbon-14 would remain. This is because half of the remaining carbon-14 decays during each half life, leaving you with 50% after one half life and 25% after two half lives.
How much of an 80-milligram sample of Iodine-131 would be left after 32 days?
After 32 days, approximately 5 milligrams of the 80-milligram sample of Iodine-131 would be left. Iodine-131 has a half-life of about 8 days, so after each 8-day period, half of the remaining sample will decay.
After three half lives what fraction of the daughter product has formed?
91.16% of the daughter product has formed after 3.5 half lives.
How much thorium in grams is there in 2 half lives?
To calculate the amount of thorium remaining after 2 half-lives, you use the formula: amount = initial amount * (1/2)^n, where n is the number of half-lives. If we assume the initial amount is 1 gram, after 2 half-lives, there would be 0.25 grams of thorium remaining.
What fraction of a sample remains after three half lives?
An eighth remains.
