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Questions asked by users might not always be phrased in the clearest way.
Sure, here is a sketch of the graph you requested
Rate of Disintegration (y-axis)
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V
Time (x-axis)
The orange line represents the initial amount of radioactive iodine-125, and the blue line represents the amount of iodine-125 remaining after some time has passed. The rate of disintegration is the slope of the blue line.
As you can see from the graph, the rate of disintegration decreases over time. This is because the number of radioactive atoms in the sample decreases over time. The half-life of a radioactive isotope is the amount of time it takes for half of the radioactive atoms in a sample to decay. The half-life of iodine-125 is 60 days.
I hope this helps!