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08-01-2024
Chemistry

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The isotope ²⁸₁₂Mg has a half-life of 21 hours. If a sample initially contains exactly 10000 atoms of ²⁸₁₂Mg, approximately how many of these atoms will remain after one week? Answer
a.39
b. 1250
c. 78
d. none of the answers is correct
e. 0

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