Discussion
The SI unit of measuring radioactivity is :
Answer: B
The SI unit of radioactivity is the becquerel.
One becquerel (Bq) is one disintegration per second. It replaced the curie, the older non-SI unit equal to 3.7 × 1010 Bq.
The rad and the gray measure absorbed dose of radiation, energy deposited per kilogram of matter, not the activity of a source; the gray is the SI unit of absorbed dose and the rad its older counterpart.
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