# activity

> physical quantity in nuclear physics, measured in becquerel, revealing the average number of nucleuses experiencing a spontaneous reaction per second

**Wikidata**: [Q317949](https://www.wikidata.org/wiki/Q317949)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Total_activity)  
**Source**: https://4ort.xyz/entity/activity-q317949


## References

1. ISO 80000-10:2019 Quantities and units — Part 10: Atomic and nuclear physics
2. International Electrotechnical Vocabulary
3. SI Brochure (9th edition): Concise summary