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HALF-LIFE WORKSHEET Name. Use Reference Table on side to assist you in answering the following questions. Equations: Vs lifes: As-81 = 33 seconds. Au-198 = 2.69 days. C-14 = 5730 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.
13 kwi 2023 · What is the half-life of the radioactive material? Half-life Problems And Answers Examples. 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.
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!
Half Life Calculations revision video for AQA GCSE Physics and GCSE Combined science. This formula can be used for some of the count rate calculations. Sample question. A radioactive isotope has an initial count rate of 60000Bq, with a half life of 4 minutes. Calculate the count rate after 12 minutes. 12 minutes/4 minutes = 3 half lives.
Half Life Worksheet – Extra Practice. 1) Fluorine-21 has a half life of approximately 5 seconds. What fraction of the original nuclei would remain after 1 minute? 2) Iodine-131 has a half life of 8 days. What fraction of the original sample would remain at the end of 32 days? 3) The half-life of chromium-51 is 28 days.
For example, radium and polonium, discovered by the Curies, decay faster than uranium. This means they have shorter lifetimes, producing a greater rate of decay. In this section we explore half-life and activity, the quantitative terms for lifetime and rate of decay.
