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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 ...
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 ...
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 half life of an element is the time it will take half of the parent atoms to transmutate into something else (through alpha or beta decays, or another process). This amount of time varies from just 10-22s to 1028s ... that's 1021 years!
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.
Practice Questions. 1. Polonium-210 has a half life of 140 days. If an original sample of Polonium-210 has an activity of 500Bq what will its activity be after 560 days. 2. A radioactive isotope undergoes a series of half lives. At the start there are 8 x 10 36 atoms of the isotope present.
Half-life \(t_{1/2}\) is the time in which there is a 50% chance that a nucleus will decay. The number of nuclei \(N\) as a function of time is \[N = N_0e^{-\lambda t},\] where \(N_0\) is the number present at \(t = 0\), and \(\lambda\) is the decay constant, related to the half-life by \[\lambda = \dfrac{0.693}{t_{1/2}}.\]
