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13 kwi 2023 · Half-life Problems And Answers Examples: I solved 12 problems and also added a video to help you understand how to apply simple methods in so
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 ...
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.
When unstable nuclei decay, they do so with a probability described by a half life. Half of what's there decays, then half of what's left decays, then half of…
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 \[\lambda = \dfrac{0.693}{t_{1/2}}.\]
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
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-Muller tube, we can measure the radiation being emitted from a a sample and calculate the radioactive half life from the results.
