-11 points SHIPPS14 10..018. What is the half-life of a radioactive isotope If the activity of...
The half-life of a radioactive isotope is 2.5 min. If there are initially 48 Times 10^32 atoms of this isotope, (a) the number of atoms of this isotope remaining after 15 min is: 12 Times 10^32 7.5 Times 10^31 3 Times 10^32 6 Times 10^4 3 Times 10^2 (b) what is the decay constant? (c) What is the initial activity?
-/1 points v SHIPPS14 10.E.019. Use the graph in the figure below to find the half-life of isotope A. All you need is a sound understanding of the definition of half-life. Grams of radionuclide 10 40 50 20 30 Time (days)
Course Contents HOMEWORKS 10 (due... Half life and activity of a radioactive ... - Timer Notes Evaluate Feedback A radioactive isotope has an activity of 8.86x109 Bq initially. After 3.65 hours the activity is 5.94x109 Bq. What is the half-life of the Isotope? Suomt Answer Tries 0/20
Part A: Tritium is a radioactive isotope of the element hydrogen. Tritium has a half-life of 12.5 years. How many years would it take until only 3.22% of a sample remain? Answer should be in years. Part B: Radioactive Carbon-11 has a half life of only 20.3 minutes and an atomic mass number of 11 u. Calculate the activity of 3.58 g of Carbon-11. Answer should be in Bq.
Assume that a hypothetical radioactive isotope has a half-life of 15 years. A 100.0-mCi sample of this radioactive isotope is deposited in a lead container. How long it will take until the activity of this sample is reduced to 1.00 mCi?
Question 18 0 out of 1 points A radioactive isotope decays with a half-life of 8.02 minutes. If a sample of the isotope initially contains 5.00 g, what mass remains after 6.01 minutes? Selected Answer. 3.13 g Answers 2.979 1.139 1.87 g 3.139
A radioactive isotope decays by B" emission with a half-life of 1.0 min. During the first 1.0 min, a particular sample emits 1000 B particles. During the next 1.0 min, the number of B- particles this sample will emit will be closest to 250. 500. O 1000. 1500. 2000.
41. | An investigator collects a sample of a radioactive isotope with an activity of 370,000 Bq. 48 hours later, the activity is 120,000 Bg. What is the half-life of the sample? 207 . 1 22
9. [-14 Points] DETAILS SPRECALC7 4.6.017. This exercise uses the radioactive decay model. The half-life of radium-226 is 1600 years. Suppose we have a 28-mg sample. (a) Find a function m(t) = moz-th that models the mass remaining after t years. m(t) = (b) Find a function m(t) = moet that models the mass remaining after t years. (Round your value to six decimal places.) m(L) = (c) How much of the sample will remain after 2500 years? (Round your...
If a container of radioactive isotope has a half-life of 10 years, how many years will it take for there to only be 25% of the isotope remaining in the container.