U235 has a decay constant of 3.138 × 10-17 s-1. Activity of 1 ug of the sample will be 80.386×10-3 Bq. How many decays per second occur when the sample is one week old?
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Q: The decay constant for 198Au is 2.97 x 10-6 s-1. Suppose we had a 1.00-ug sample of 198Au. What is…
A: Radioactive decay is the process by which an unstable nucleus spontaneously loses energy by emitting…
- Unstable nuclei become stable by radiating energy. This process is called radioactivity. The rate at which this takes place is called activity.
- Radioactivity follows an exponential form. The activity thus is given by the exponential law of radioactive decay.
- As per the exponential law of radioactive decay, the activity of a radioactive sample is given by,
Here a0 is the original activity, λ is the decay constant, and t is the time.
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