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
Correct Answer:

Verified
Correct Answer:
Verified
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