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The definition of half-life is the time taken for the count rate from a sample to decrease to half the initial value. If we use a radiation detector, such as a Geiger-Mulle r tube, we can measure the radiation being emitted from a a sample and calculate the radioactive half life from the results.
13 kwi 2023 · Half-life Problems And Answers Examples: Here are 18 half-life problems and answers to help you understand how to solve a question about half-life: half-life problem: video solution Problem 1
Problem #10: How much time will be required for a sample of H-3 to lose 75% of its radioactivity? The half-life of tritium is 12.26 years. Solution: If you lose 75%, then 25% remains. Use 0.25 rather than 25%. (1/2) n = 0.25 n = 2 (remember (1/2) 2 = 1/4 and 1/4 = 0.25) 12.26 x 2 = 24.52 years Comment: the more general explanation follows: (1/2 ...
The Radioactivity and Half-Life calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate. Not sure on some or part of the Radioactivity and Half-Life questions? Review the tutorials and learning material for Radioactivity and Half-Life
Practise Questions on Half-Life. Q1. A newly prepared radioactive nuclide has a decay constant λ of 10 –6 s –1. What is the approximate half-life of the nuclide? a.) 1 hour. b.) 1-day. c.) 1 week. d.) 1 month. Q2. If the decay constant of a radioactive nuclide is 6.93 x 10 –3 sec –1, its half-life in minutes is: a.) 100. b.) 1.67. c ...
The graph shows how the activity of a sample of a radioactive material changes with time. The sample has an initial activity of 80 counts per minute. Use the graph to find the half-life of the material. (ii) Another sample of the material has an initial count rate of 40 counts per minute.
HALF-LIFE PROBLEMS. Name Block. 1. An isotope of cesium (cesium-137) has a half-life of 30 years. If 1,0 g of cesium-137 disintegrates over a period of 90 years, how many g of cesium-137 would remain? A We) r" 2. Actinium-226 has a half-life of 29 hours.
