Initially, the sample composition is 1:1, i.e., the same number of nuclei A as nuclei B. Problem #28: A sample of radioactive isotopes contains two different nuclides, labeled A and B. In 24 hours, the sample goes from 100% to 95% How long will it take for half the original to decay?
Problem #27: You have 20.0 grams of P-32 that decays 5% daily. Therefore the total amount of elapsed time for A was 2.Ĭ) Allow B to go through several half-lives such that the total amount of time = 2. Find f.ī) Let us set the length of one half-life of A equal to 1. In the same period the number of radio-active nuclei in sample B decreases to a fraction f of the number present initially. In a certain period the number of radio-active nuclei in sample A decreases to one-fourth the number present initially. Problem #26: The half life in two different samples, A and B, of radio-active nuclei are related according to T(1/2,B) = T(1/2,A)/2. ChemTeam: Half-Life Problems #26 - 40 Half-Life Problems #26 - 40 Ten Examples Problems involving carbon-14 Probs 1-10 Problems involving uranium-238 Probs 11-25 Examples and Problems only (no solutions) Return to Radioactivity menu
