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

question 89

Multiple Choice

Radioactive decay: 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.

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