Ci (Noun)
Meaning
A unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second.
Classification
Nouns denoting quantities and units of measure.
Examples
- The nuclear reactor's core was measured to have a radioactivity of 100 ci, a level considered extremely hazardous to human health.
- The medical researcher carefully handled the sample containing 10 ci of radioactive material, taking care not to expose herself to its radiation.
- The nuclear power plant's safety protocols were designed to prevent the release of more than 1 ci of radioactive material into the environment.
- The scientist calculated that the half-life of the isotope was approximately 5 years, during which time its radioactivity would decrease from 50 ci to 25 ci.
- The hospital's radiation safety officer ensured that all medical equipment containing more than 0.1 ci of radioactive material was properly stored and labeled.