Becquerel

**Semantic type:** Quantitative Concept

**Definition:** A SI derived unit of activity of a radionuclide, equal to one nuclear disintegration or other nuclear transition from a particular energy state occurring in an amount of a radionuclide during one second-long time interval.

**Synonyms:** - Bq - Bq - Bq - Bq - Bq - Bq - Bq - becquerel - becquerel