Units of radioactivity
= Units of radioactivity
{wiki=Category:Units_of_radioactivity}
The unit of radioactivity is called the **becquerel (Bq)**. One becquerel is defined as one disintegration (or decay) per second. In addition to the becquerel, other units have historically been used, including the **curie (Ci)**, where 1 curie is equivalent to 3.7 × 10^10 disintegrations per second.