The unit of radioactivity curie is equal to________________?
Correct answer: B. 3.70 x 10^10 disintegration per sec
- A. 3.74 x 10^9 disintegration per sec
- B. 3.70 x 10^10 disintegration per sec
- C. 3.55 x 10^10 disintegration per sec
- D. 3.60 x 10^10 disintegration per sec
Explanation
One curie is defined as 3.70 x 10^10 disintegrations per second, so the correct value is option b. The SI unit becquerel equals 1 disintegration per second, and 1 Ci = 3.70 x 10^10 Bq. The likely trap is option d, whose 3.60 x 10^10 disintegrations per second is a close but incorrect rounded value.
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About Radioactive Decay
Radioactive decay is the spontaneous transformation of unstable nuclei, described by decay constant, activity, half life and the exponential decay law. Work includes alpha, beta and gamma emissions, decay equations and remaining nuclei, with half life distinguished from the time required for complete decay.
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