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Radioactive Definition & Meaning - Merriam-Webster
https://www.merriam-webster.com/dictionary/radioactive
Webra· dio· ac· tive ˌrā-dē-ō-ˈak-tiv. 1. : of, caused by, or exhibiting radioactivity. radioactive isotopes. Radon is an odorless, colorless gas that arises naturally from the ground …
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RADIOACTIVE | English meaning - Cambridge Dictionary
https://dictionary.cambridge.org/dictionary/english/radioactive
Webhaving or producing powerful and dangerous energy that comes from the breaking up of atoms: Uranium is a radioactive material. radioactive waste. considered extremely …
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Radioactivity | Definition, Types, Applications, & Facts
https://www.britannica.com/science/radioactivity
WebAug 28, 2023 · Radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously. It is, in essence, an attribute of individual atomic nuclei.
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Radioactivity Definition & Meaning - Merriam-Webster
https://www.merriam-webster.com/dictionary/radioactivity
WebThe meaning of RADIOACTIVITY is the property possessed by some elements (such as uranium) or isotopes (such as carbon 14) of spontaneously emitting energetic particles (such as electrons or alpha particles) by the disintegration of their atomic nuclei; also : …
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Radioactive Definition & Meaning | Dictionary.com
https://www.dictionary.com/browse/radioactive
Webradioactive. [ rey-dee-oh-ak-tiv ]show ipa. See synonyms for radioactiveon Thesaurus.com. adjective. Physics, Chemistry. of, relating to, exhibiting, or caused by radioactivity: A pressing issue in post-Soviet Russia is safe long-term storage of radioactive waste, from both military and civilian applications. relating to or being a person ...
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Radioactive - Definition, Meaning & Synonyms | Vocabulary.com
https://www.vocabulary.com/dictionary/radioactive
Web/ˌˈreɪdioʊˌæktɪv/ /reɪdiəʊˈæktɪv/ IPA guide When an object gives off a certain kind of energy, like the sun or an x-ray machine, it can be described as radioactive. The adjective radioactive is a scientific term for a particular type of energy-emitting substance or thing.
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Radioactivity Definition in Science - ThoughtCo
https://www.thoughtco.com/definition-of-radioactivity-606338
WebSep 6, 2019 · Radioactivity is the process by which an unstable atomic nucleus loses energy by emitting radiation. While radioactivity results in the release of radiation, not all radiation is produced by radioactive material. The SI unit of radioactivity is the becquerel (Bq). Other units include the curie, gray, and sievert.
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Radioactive Definition & Meaning | Britannica Dictionary
https://www.britannica.com/dictionary/radioactive
WebBritannica Dictionary definition of RADIOACTIVE. [more radioactive; most radioactive] : having or producing a powerful and dangerous form of energy (called radiation) Uranium and plutonium are radioactive. radioactive material/waste.
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Radioactive definition and meaning | Collins English Dictionary
https://www.collinsdictionary.com/dictionary/english/radioactive
WebSep 23, 2023 · Something that is radioactive contains a substance that produces energy in the form of powerful and harmful rays . The government has been storing radioactive waste at Fernald for 50 years. radioactivity (reɪdioʊæktɪvɪti ) uncountable noun ...waste which is contaminated with low levels of radioactivity.
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What Is Radioactivity? - Energy
https://ehss.energy.gov/ohre/roadmap/achre/intro_9_2.html
WebRadioactivity is a physical, not a biological, phenomenon. Simply stated, the radioactivity of a sample can be measured by counting how many atoms are spontaneously decaying each second. This can be done with instruments designed to detect the particular type of radiation emitted with each "decay" or disintegration.
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