The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year¯¹. What fraction of the tritium initially in a sample is still present 30 years later?

Question

Quizplus · Accepted Answer

The fraction remaining can be calculated using the first-order decay formula: N/N0 = e^(-kt). Substituting k = 0.056 year¯¹ and t = 30 years, we get N/N0 = e^(-0.056*30) ≈ 0.19.

The Radioactive Isotope Tritium Decays with a First-Order Rate Constant