A radioactive isotope decays by β^- emission with a half-life of 1.0 min. During the first 1.0 min, a particular sample emits 1000 β^- particles. During the next 1.0 min, the number of β^- particles this sample will emit will be closest to A) 250. B) 500. C) 1000. D) 1500. E) 2000.

Question

Quizplus · Accepted Answer

Since the half-life is 1.0 min, we know that after 1.0 min, the number of particles emitted will be half of the initial number. Therefore, after 1.0 min, the sample will emit approximately 500 β^- particles.

A Radioactive Isotope Decays by β- Emission with a Half-Life

A Radioactive Isotope Decays by β^- Emission with a Half-Life