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34. The half-life of neptunium-231 is 50.0 min. How many minutes will it take for 5.0...
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.
Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of Np-239 to decay to 1.00% of its original quantity? I need an explanation with formulas and equations
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?
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...
The half-lives of different radioisotopes are given in the table. Half-life (min) Radioisotope argon-44 12 lead-196 37 22 potassium 44 indium-117 43 If the initial amount of potassium-44 is 8.8 g, how much potassium-44 is left in the body after 44 min? mass: g TOOLS x10 What is the half-life of an isotope that decays to 12.5% of its original activity in 70.6 h? half-life: h The half-lives of different radioisotopes are given in the table. Half-life (min) 12 Radioisotope...
e18 A radioactive element has a half-life of 2.1 hours. How many hours will it take for the number of atoms present to decay to one-sixteenth of the initial value? 8.4 0.20 34 21 17
The decay of antimony-131 is first order with a half life is 23.03 minutes. How long (in minutes) would it take for a 1.4100 g sample to be reduced to 0.0893 g?
if a substance has a half-life of 19.1 years, how many years will it take for 125 g of the substance to be depleted to 5.0
5 of 5 A certain substance has a half-life of 5.0 hours. How many nuclei of the substance are required to give an initial activity of 7.0 Cl? (1 Ci = 3.7 * 1010 Bq) 2.4 x 10 nuclei 8.5 x 10 nuclei 3.2 x 10 nuclei 6.7 x 10 nudel AR EN 246 PM Type here to search ар)
Uranium-235 has a half-life of 7.04 x 108 years. How many years will it take for 99.9% of a U.235 sample decay A. 7.08 105 yr B. 1.0 x 106 yr C. 4.7 x 10º yr D.4.9 x 109 yr * E. 7.08 109 yr