A Radioactive Isotope Has a Half-Life of One Week

question 142

Multiple Choice

A radioactive isotope has a half-life of one week. At the end of two weeks the amount remaining is

• A)none,
• B)one-eighth,
• C)one-quarter,
• D)one-half,
• And at the end of three weeks the amount remaining is
• E)none.
• F)one-eighth.
• G)one-quarter.
• H)one-half.

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