Cobalt-60 Is a Beta Emitter with a Half-Life of 5

question 112

Multiple Choice

Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years

• A) 1/5
• B) 1/16
• C) 1/26
• D) 1/32
• E) 1/64

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