alleryWhat is the SI unit of radioactivity?
ARutherford
BCurie
CRoentgen
DBecquerel
Answer & Solution
Correct answer: D. Becquerel
1. Radioactivity is measured by the number of disintegrations per second.
2. One disintegration per second is one becquerel, the SI unit.
3. Curie and rutherford are older, larger units, not SI.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 6 Nuclear Physics "Nuclear Physics", p.83_
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