Definition of Radium. Meaning of Radium. Synonyms of Radium

Here you will find one or more explanations in English for the word Radium. Also in the bottom left of the page several parts of wikipedia pages related to the word Radium and, of course, Radium synonyms and on the right images related to the word Radium.

Definition of Radium

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 Radium from wikipedia

- Radium is a chemical element; it has symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline...
- The Radium Girls were female factory workers who contracted radiation poisoning from painting radium dials – watch dials and hands with self-luminous paint...
- 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...
- refer to: Radium, Colorado, United States Radium, Kansas, United States Radium, Minnesota, United States Radium, Virginia, United States Radium Hot Springs...
- and District Radium Institute National Radium Institute, Denver, Colorado, United States Sino-Belgium Radium Institute Institute for Radium Research, Vienna...
- Radium jaw, or radium necrosis, is a historic occupational disease brought on by the ingestion and subsequent absorption of radium into the bones of radium...
- foundations for Warsaw's Radium Institute. Her second American tour, in 1929, succeeded in equipping the Warsaw Radium Institute with radium; the Institute opened...
- Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials...
- Radium-226 (226 Ra ) is the longest-lived isotope of radium, with a half-life of 1600 years. It is an intermediate product in the decay chain of uranium-238;...
- Radium Girls is a 2018 American drama film directed by Lydia Dean Pilcher and Ginny Mohler and starring Joey King and Abby Quinn. Lily Tomlin and Jane...