The Initial Activity of a Cobalt-60 Sample Was 1200 Dpm

question 15

Multiple Choice

The initial activity of a cobalt-60 sample was 1200 dpm and dropped to 75 dpm after 21.2 years.What is the half-life of this radionuclide?

• A)4.24 years
• B)5.30 years
• C)7.07 years
• D)10.6 years
• E)21.2 years

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Final Topic

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