how many half lives does it take for a radioactive isotope to reach 1/5 its initial...
i know the answer is 2.32 half lives but im not sure how to do the work Problem 4 its initial number? How many half lives does it take for a radioactive isotope to reach
The half-life of a radioactive isotope is 220 d. How many days would it take for the decay rate of a sample of this isotope to fall to 0.47 of its initial rate?
If the half-life of a radioactive isotope is 32 days, how many half-lives must pass before a 3000mg sample is less than 0.03g? 05 O 2 07 More information is needed. 9
Find the remaining mass of a radioactive isotope after 3 half lives. The initial mass of the material was 100g.
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.
The radioactive isotope, Fr - 223, has a half-life of 22 minutes. How many minutes will it take for an original sample to decay to 12.5% of its original amount? Express your answer in minutes. Enter only the numeric value of the answer without the units.
After 2 half-lives have passed, what % of the original radioactive isotope remains?
14C is a radioactive isotope with a half life of 5.73x10^3 years. Radioactive decay is first order process and the amount of 14C present in an object can be used to determine its age. How long does it take for for 90 % of the 14C in a sample to decompose?
Questions 3.03 Suppose a radioactive isotope has half-life-99.11. How long will take for a sample of the Isotope to decay to 3.0% of its originaltivity? a 2181 b. 0.0354h C348 yr d. 297 h e. 501 he Oь Od Od O. Question 303 A radioactive stope has halte-273 How long will be for 3.27 mmple of the Isotope to decay to 0.351 CIT 00817 y 382 y 133 y d. 87.9 y 6.60.9 y O. Оe Question 7 3.03 pts...
1. A patient is given 0.050 mg of technetium-99 m, a radioactive isotope with a half-life of about 6.0 hours. How long does it take for the radioactive isotope to decay to 4.2×10−3 mg ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures.