Definitions for radioactivity
ˌreɪ di oʊ ækˈtɪv ɪ tira·dioac·tiv·i·ty

Princeton's WordNetRate this definition:2.5 / 2 votes

1. radiation, radioactivitynoun

   the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

GCIDERate this definition:3.0 / 1 vote

1. radioactivitynoun

   a form of instability which is a property of the atomic nuclei of certain isotopes, which causes a spontaneous change in the structure of the nucleus, accompanied by emission of energetic radiation. The radiation emitted is usually sufficient to cause ionization in matter through which it passes, and is therefore called ionizing radiation. The radiation emitted by most radioactive substances is one of three types: alpha rays, beta rays, or gamma rays. Some chemical elements have no stable isotopes, and these are referred to as radioactive elements, and the element itself is said to possess radioactivity. The changes in radioactive nuclei which cause radiation in most cases cause the chemical identity of the nucleus itself to change, as when tritium (an isotope of hydrogen) emits a beta ray and converts to helium. The radioactive decay process is a first-order reaction, and the rate of decay of a particular isotope can therefore be expressed as the half life of the isotope, which is the time it takes for one half of the remaining undecayed isotope to decay, and is a constant independent of the proportion of original material which has already decayed. The half life of tritium, for example, is 12.3 years.

WiktionaryRate this definition:1.5 / 2 votes

1. radioactivitynoun

   Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.

2. radioactivitynoun

   The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.

WikipediaRate this definition:0.0 / 0 votes

1. radioactivity

   Radioactivity (German: "Radioaktivität") is a song by the German electronic music band Kraftwerk, featuring Emil Schult. It was released in May 1976 as the lead and only single from their fifth studio album, Radio-Activity (1975). The song was a commercial success in France, but was not as successful in other countries as Kraftwerk's previous hit single "Autobahn".

ChatGPTRate this definition:0.0 / 0 votes

1. radioactivity

   Radioactivity is the natural process by which certain unstable atomic nuclei, known as isotopes, emit energy and/or particles due to the spontaneous transformation in their nucleus. This process leads to the formation of different, more stable elements. The three common types of radioactive emissions are alpha, beta, and gamma radiation. Radioactivity is used in various applications including medicine, power generation, and scientific research.

WikidataRate this definition:2.5 / 2 votes

1. Radioactivity

   "Radioactivity" is a song written by Ralf Hütter, Florian Schneider and Emil Schult, and recorded by electronic band Kraftwerk as the title track of its 1975 album Radio-Activity.

U.S. National Library of MedicineRate this definition:2.0 / 1 vote

1. Radioactivity

   The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

How to pronounce radioactivity?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say radioactivity in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of radioactivity in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of radioactivity in Pythagorean Numerology is: 3

Examples of radioactivity in a Sentence

1. Nick Pope:

   Scientific advice should be sought when necessary for instance, if a soil sample needs to be checked for radioactivity, but one doesnt need to be a scientist, or even adopt a scientific methodology, to interview a witness, cross-check with information about flight paths and find out, say, that at the time and location of a particular UFO sighting, the Goodyear blimp was in the area.

2. James Acton:

   The main danger here is damage to the systems needed to keep the fuel in the reactor cool -- external power lines, emergency diesel generators, equipment to dissipate heat from the reactor core, in a war, repairing this equipment or implementing countermeasures could be impossible. In the worst case, the fuel could melt and spread large amounts of radioactivity into the environment.

3. Chuck Schumer:

   While inspectors would likely be able to detect radioactive isotopes at a site after 24 days, that delay would enable Iran to escape detection of any illicit building and improving of possible military dimensions( PMD) - the tools that go into building a bomb but don't emit radioactivity.

4. Kai Vetter:

   Even if some of the radioactive materials 'leaked' or still 'leak' from the ship, this radioactivity will be diluted very quickly in the water reducing the concentration substantially, in addition, the radiation emitted by the radioactive materials on the ship will not travel very far as the water is an excellent shield.

5. Yves Marignac:

   A scenario which leads to water loss by damage to the pools could lead to a release of radioactivity of the same or higher order than a core meltdown.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=radioactivity
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=radioactivity
3. ^ Wiktionary
   https://en.wiktionary.org/wiki/Radioactivity
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Radioactivity
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=radioactivity