original question: In which measurement system [Becquerel] is the radioactivity unit?
answer: international system of units
answer type: Measurement System.
auxiliary information: The becquerel is the SI derived unit of radioactivity. One Bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. The Bq unit is therefore equivalent to an inverse second, s‚àí1. The becquerel is named after Henri Becquerel, who shared a Nobel Prize with Pierre Curie and Marie Curie in 1903 for their work in discovering radioactivity.
[Becquerel] is a radioctivity unit within which system of measurement?