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: 
Over the first 25.0 s,what is the disintegration rate of A?
A) 0.120 disintegrations per second
B) 1.81 × 1021 disintegrations per second
C) 3.00 disintegrations per second
D) 7.23 × 1019 disintegrations per second
E) 1.38 × 10-20 disintegrations per second
Correct Answer:
Verified
Correct Answer:
Verified
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