Question: the isotope 90sr with a halflife of 2878 yrs is...
The isotope 90Sr with a half-life of 28.78 yrs is produced in nuclear explorations. Its chemical behavior is similar to Ca and is incorporated into growing bones. Suppose a 3-year-old child drank milk from cows that had 90Sr during feeding. If 1.5 microgram was absorbed through the milk by the child, how much would remain when the child was 21 years old?
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