After 10 Years, 75 G of an Original Sample of 100

question 47

Multiple Choice

After 10 years, 75 g of an original sample of 100 g of a certain radioactive isotope has decayed.The half-life of the isotope is

• A)5 years.
• B)7.5 years.
• C)20 years.
• D)40 years.

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