The half-life of a radioactive element with mass number 234 g is 2.5 × 10⁵ years. How long after the isolation of a sample of this isotope will only one-sixth of the original mass be left?
University of Ilorin CHM101 practiceOwulade past question
- 4.87 × 10⁵ years
- 6.47 × 10⁵ years
- 8.47 × 10⁵ years
- 7.48 × 10⁵ years
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