What is the half-life of this thorium isotope in days round
One-fourth of a sample of 227 over 90 Th remains undecayed after 20 days. What is the half-life of this thorium isotope in days? Round to the nearest day.
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one-fourth of a sample of 227 over 90 th remains undecayed after 20 days what is the half-life of this thorium isotope
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