Definition: The becquerel is the derived unit for radionuclide activity..
Source: SI Brochure 9th Ed. 2019, p 138
Status: Valid
Notes
The becquerel is the SI coherent derived unit for activity referred to a radionuclide.
The hertz shall only be used for periodic phenomena and the becquerel shall only be used for stochastic processes in activity referred to a radionuclide.
Activity referred to a radionuclide is sometimes incorrectly called radioactivity.