If an isotope has a half-life of 4 billion years, then in 4 billion years what will happen?
a...
If an isotope has a half-life of 4 billion years, then in 4 billion years what will happen?
a. all of the original amount will have decayed
b. half of the original amount will still be present
c. a quarter of the original amount will still be present
d. all of the original amount will still be present
Answers: 3
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