Meaning & Definition of word "Radioactivity"
Radioactivity
/ˌreɪ.di.oʊˈæk.tɪ.vɪ.ti/
noun:
- 1. The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
- Example: Radioactivity is a natural process that occurs in elements such as uranium and thorium.
- 2. The property of certain elements to emit radiation.
- Example: Scientists study radioactivity to understand the behavior of unstable isotopes.
- 3. The process through which a substance gives off energy in the form of particles or electromagnetic waves.
- Example: Radioactivity can be harmful, which is why safety measures are strictly enforced in nuclear facilities.
- 4. The rate at which a radioactive substance releases radiation.
- Example: The radioactivity of the sample was measured in units of becquerels.
- 5. An aspect of nuclear physics that examines the decay of radioactive materials.
- Example: Research in radioactivity has led to advancements in medical imaging techniques.
Etymology
●The term originates from the combination of 'radio-' from radiate and 'activity' referring to the process of emitting radiation.
Common Phrases and Expressions
background radiation:
The level of radiation that exists in the environment from natural sources.
half-life:
The time required for half the quantity of a radioactive substance to decay.
radiological hazard:
A situation involving exposure to radiation that may pose a risk to health.
Related Words
radioisotope:
An isotope that has radioactive properties.
nuclear fission:
A nuclear reaction in which the nucleus of an atom splits into smaller parts, releasing energy.
nuclear fusion:
The process by which two or more atomic nuclei join together to form a heavier nucleus, releasing energy.
Slang Meanings of radioactivity
Meaning: Going nuclear
● Example Sentence: When things get out of hand or very intense, some might say it's going nuclear, referencing the explosive nature of nuclear reactions.
Meaning: Hot stuff
● Example Sentence: When describing something or someone that is very radioactive or dangerous, people might colloquially refer to it as hot stuff.