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13 kwi 2023 · Answer. The half-life of the radioactive material is 4.8 days. Explanation. We are going to apply two methods to arrive at our answer. Method 1: Conventional method. 64 g to 32 g = 1 half-life. 32 g to 16 g = 2 half-life. 16 g to 8 g = 3 half-life. 8 g to 4 g = 4 half-life. 4 g to 2 g = 5 half-life. If 5 half-life is equal to 24 days. Then 1 ...
HALF-LIFE CALCULATIONS Nam© Half-life Is th© time required for one-half of a radioactive nuclide to decay (change to another element). It Is possible to'calculate the amount of a radioactive element that will be left if we know its half-life. r Example: The half-life of Po^M Is 0.001 second. How much of a 10 g sample will be left after 0.003 ...
To calculate the half-life of a sample, the procedure is: Measure the initial activity, A 0, of the sample; Determine the half-life of this original activity; Measure how the activity changes with time; The time taken for the activity to decrease to half its original value is the half-life
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.
8 lis 2010 · An isotope of cesium (cesium-137) lias 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?
Problem #1: The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed? Solution: 7.2 / 2.4 = 3 half-lives (1/2) 3 = 0.125 (the amount remaining after 3 half-lives) 100.0 g x 0.125 = 12.5 g remaining
Sample Question. A sample of a radioactive isotope has 4 x 10 18 atoms present. After two half lives there are 1 x 10 18 atoms present. Calculate the net decline. It can also be defined in terms of count rate: Net decline is the ratio of the count rate in a sample now to the initial count rate. Sample Question.
