Use the graph to answer the questions.
What is the half-life of isotope X? 25 seconds
How ma...
Use the graph to answer the questions.
What is the half-life of isotope X? 25 seconds
How many radioactive atoms of isotope X are left after 3 half-lives? 13
How many half-lives must have occurred if only 7 atoms of isotope X are left? 4
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Answers: 2
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