Definition of Radiums. Meaning of Radiums. Synonyms of Radiums

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Definition of Radiums

Radium
Radium Ra`di*um, n. [NL., fr. L. radius ray.] (Chem.) An intensely radioactive metallic element found (combined) in minute quantities in pitchblende, and various other uranium minerals. Symbol, Ra; atomic weight, 226.4. Radium was discovered by M. and Mme. Curie, of Paris, who in 1902 separated compounds of it by a tedious process from pitchblende. Its compounds color flames carmine and give a characteristic spectrum. It resembles barium chemically. Radium preparations are remarkable for maintaining themselves at a higher temperature than their surroundings, and for their radiations, which are of three kinds: alpha rays, beta rays, and gamma rays (see these terms). By reason of these rays they ionize gases, affect photographic plates, cause sores on the skin, and produce many other striking effects. Their degree of activity depends on the proportion of radium present, but not on its state of chemical combination or on external conditions.The radioactivity of radium is therefore an atomic property, and is explained as result from a disintegration of the atom. This breaking up occurs in at least seven stages; the successive main products have been studied and are called radium emanation or exradio, radium A, radium B, radium C, etc. (The emanation is a heavy gas, the later products are solids.) These products are regarded as unstable elements, each with an atomic weight a little lower than its predecessor. It is possible that lead is the stable end product. At the same time the light gas helium is formed; it probably consists of the expelled alpha particles. The heat effect mentioned above is ascribed to the impacts of these particles. Radium, in turn, is believed to be formed indirectly by an immeasurably slow disintegration of uranium.

Meaning of Radiums from wikipedia

- ISBN 978-0-8493-0484-2. Weigel, F.; Trinkl, A. (1968). "Zur Kristallchemie des Radiums" [On radium's chemical chrystalography]. Radiochim. Acta (in German). 10 (1–2):...
- The Radium Girls were female factory workers who contracted radiation poisoning from painting radium dials – watch dials and hands with self-luminous paint...
- RaI2 + H2O + CO2 Weigel, F.; Trinkl, A. (1968). "Zur Kristallchemie des Radiums". Ract. 9: 36–41. doi:10.1524/ract.1968.9.1.36. S2CID 201843329. Donnay...
- Radium Springs may refer to: Radium Hot Springs, British Columbia, a village in British Columbia Radium Hot Springs Airport Radium Springs, Georgia Radium...
- Hönigschmid, O.; Sachtleben, R. (1934). "Revision des Atomgewichtes des Radiums". Zeitschrift für anorganische und allgemeine Chemie. 221: 65–82. doi:10...
- Radium girl may refer to: The Radium Girls, female workers who painted glowing radium watch dials in the 1920s and suffered from radium jaw and death...
- Radium, elevation 6,890 feet (2,100 m), is a small rural unincorporated community in southwestern Grand County, Colorado, United States. The community...
- Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials...
- The radium fad or radium craze of the early 20th century was an early form of radioactive quackery that resulted in widespread marketing of radium-infused...
- refer to: Radium, Colorado, United States Radium, Kansas, United States Radium, Minnesota, United States Radium, Virginia, United States Radium Hot Springs...