17. If it takes 3.4 years for a radioactive isotope to decay to 1/16 of its...
Question 22 (1 point) Suppose the exponential decay of a radioactive isotope is modeled by the function N = No (N ). What variable represents the initial amount of isotope? What variable represents the decay factor? A e represents the initial value and No represents the decay factor. B) No represents the initial value and N represents the decay factor. C) none of these OD No represents the initial value and e represents the decay factor. E) e represents the...
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?
A Radioactive Isotope is 1. Time for half of a sample to decay from parent isotope to daughter isotope for radioactive atoms 2. The technique of getting the age of something by using unstable isotopes 3. An element that has unstable nuclei and will transform itself into another element 4. The process of an element transforming into another element by changes of its nucleus
Element X is a radioactive isotope such that every 30 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 4000 grams, write a function showing the mass of the sample remaining after t years, where the annual decay rate can be found from a constant in the function. Round all coefficients in the function to four decimal places. Also, determine the percentage rate of decay per year, to the nearest hundredth...
Radioactive decay occurs when a radioactive isotope ("parent" isotope) gradually transforms into a radiogenic isotope ("daughter" isotope) over time. This process is modeled by the following function: where r is the ratio of parent to daughter atoms, t is time and τΗ is called the halflife. The following table shows several parent-daughter pairs along with their half-lives. Daughter N14 Srs7 Ar4o Pb206 Pb207 Half-Life (years) 5730 48.8 x 109 1.3 x 109 4.6 x 109 0.7 x 10 arent Rbs7...
11. If calcium-40 were to undergo radioactive decay, which isotope would it most likely form? A) calcium-41 B) calcium-39 C) potassium-40 D) scandium-40 E) argon-36
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 Cadmium isotope 109Cd is radioactive. A sample begins decay with 1012 Cd atoms. After 500 days, 4.7 x 1011 atoms remain. What is the half-life of this sample? (a) 46 days (b) 102 days (c) 459 days -- right answer but not sure how to get it (d) 662 days (e) none of the above
The isotope lodine-131 is a radioactive isotope used in industrial and medical applications. It is prepared just before use because it decays rapidly through beta emission. Use the data in the table below to answer the following questions (a) Write the reaction equation. (Note m indicates an excited state of the isotope, which is generally denoted with an asterisks after the symbol, such as X*) (b) What is the rate constant for the decay? Show how you obtained this rate...
The decay curve of a radioactive nuclide sample is shown. Its initial activity is measured to be X Bq. 14. What is the population at t=8.0 15. After how many half lives will the population be 125 nuclides? 16. What will be the level of activity (in terms of X) after two half lives have elapsed? 17. What would the activity of the above sample be if we tripled its size? 18. If the initial activity of 0.356 grams of...