In the Following Diagrams, a Represents a Radioactive Isotope That

question 107

Multiple Choice

In the following diagrams, A represents a radioactive isotope that decays into a new isotope, X. Each circle represents 1 mmol of atoms. t = 0: t = 25.0 s: What is the half-life of A?

• A) 6.25 s
• B) 18.8 s
• C) 25.0 s
• D) 50.0 s
• E) 60.2 s

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