For a Sample of a Given Radioactive Isotope, the Ratio

question 13

Multiple Choice

For a sample of a given radioactive isotope, the ratio of the number of atoms of the isotope at time t to the number at time t + T_1/2 is

• A) always 2.
• B) dependent on how long it has been since t = 0.
• C) Dependent upon what the value of T_1/2.
• D) always 1/2.
• E) might be any number less than 1/2.

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