curie
| Symbol: | Ci |
| Category: | Radioactivity |
| SI Equivalent: | 3.7×1010 Bq |
| Dimension: | T-1 |
| Notes | |
Named after the French scientists Pierre and Marie Curie, the Ci is equal to the radioactivity of a source which has the same radioactivity as 1 gram of the radium isotope  in secular equilibrium with its radon derivative  . | |
1 Ci =
| Frequency | ||
| Symbol | Unit Name | |
| 3.7×1010 | cps | cycles per second |
| 3.7×1010 | Hz | hertz |
| Radioactivity | ||
| Symbol | Unit Name | |
| 3.7×1010 | Bq | becquerel |
| 37 | GBq | gigabecquerel |
| 3.7×104 | MBq | megabecquerel |
| 1000 | mCi | millicurie |
