Strontium-90 is a byproduct in nuclear reactors fuelled by the radioisotope uranium-235.The half-life Of strontium-90 Is 28.8 y.What percentage of a strontium-90 sample remains after 75.0 y?

Question

Quizplus · Accepted Answer

To find the percentage of strontium-90 remaining after 75.0 years, use the formula for exponential decay: N(t) = N0 * (1/2)^(t/T), where N0 is the initial amount, t is the time elapsed, and T is the half-life. Substituting the given values: N(75) = N0 * (1/2)^(75/28.8). This calculates to approximately 16.4% remaining.

Strontium-90 Is a Byproduct in Nuclear Reactors Fuelled by the Radioisotope