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

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The half-life of the radioactive isotope is 1.0 min, which means that after 1.0 min, the number of particles emitted will be halved. In the first minute, 1000 particles are emitted. After one half-life (i.e. 1.0 min), the remaining number of particles will be 1000/2 = 500. Therefore, during the next minute, the sample will emit approximately 500 β^- particles. The closest option to this number is B) 500.

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

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