Assertion: tracer | /r/HasProperty | radioactive
Facets:
Source sentences:
text: Tracers can be radioactive or chemical, gas or liquid and have been used extensively in the oil industry and hydrology for decades.
text: A tracer is a radioactive material which is put into a liquid (or gas ).
text: The tracer is radioactive, which means your body is exposed to radiation.
text: Tracers can be chemical properties, such as radioactive material, or chemical compounds, physical properties, such as density, temperature, salinity, or dyes, and can be natural or artificially induced.