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Introductory Physics Homework Help
Solve Half-Life Problem: Find # Atoms Decaying in 12 Days
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[QUOTE="VjStylz, post: 5472679, member: 587284"] Alright so i have exams in a matter of days and stumbled upon this multiple choice question 7. A radioactive source has 1.6×10^20 atoms of a radioactive isotope, with a half-life of 3 days. How many atoms will decay in 12 days? A. 1.0×10^19 B. 1.2×10^20 C. 4.0×10^19 D. 1.5×10^20 So my first obvious choice of discourse was to attack the question in terms of proportionality: 3 = 1.6 * 10^20 12 = x And my answer was : 6.4 * 10^20, Which is not even close to any of the above options. I reall don't know what to do from here. Please Help, Thanks in advance [/QUOTE]
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Solve Half-Life Problem: Find # Atoms Decaying in 12 Days
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