radioactivity
word
Definition
Radioactivity is the process by which certain substances release energy as radiation, usually as a result of changes in their atomic structure. This energy can be harmful to living things if not handled safely.
Usage & Nuances
"Radioactivity" is mostly used in scientific or technical contexts. Common collocations: "high levels of radioactivity," "measure radioactivity," "radioactive waste." Don't confuse it with "radiation" (the energy itself) or "radioactive" (the adjective form).
Example Sentences
Some elements like uranium have high radioactivity.
basic
We need special equipment to measure radioactivity.
basic
The scientist explained the dangers of radioactivity to the students.
basic
Long-term exposure to radioactivity can lead to health problems.
natural
After the accident, the area was closed because of high radioactivity.
natural
They tested the soil for signs of radioactivity before building houses.
natural