Look up: radium

1. 
   Radium
   Radium is a radioactive gaseous element with the symbol Ra.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   Radium
   Radium is a city in Stafford County Kansas, USA
   Found on http://www.encyclo.co.uk/nol.php
   
   
3. 
   Radium
   Radium consists of 16 isotopes, the most abundant being the Radioactive Radium-226. This is a metallic substance, has a Half-Life of 1602 years and Decays via a complicated chain, eventually leading to stable Lead-206. Along the way it decays to Radon Gas (Rn-222). Radium was isolated from pitchblende in 1898 by Marie and Pierre Curie. The activity of 1g of radium was used to define the activity unit, the Curie (Ci). Radium is difficult to shield needing significant quantities of lead. In addition, radium contaminated dust is a particular inhalation hazard due to its abundant Alpha Particle decay.
   Found on http://www.ionactive.co.uk/glossary_atoz
   
   
4. 
   radium
   [n] - an intensely radioactive metallic element that occurs in minute amounts in uranium ores
   Found on http://www.webdictionary.co.uk/definitio
   
   
5. 
   Radium
   A radioactive element of the alkaline earth metals. White in colour and properties close to barium. Symbol Ra
   Found on http://www.diracdelta.co.uk/science/sour
   
   
6. 
   Radium
   A radioactive decay product of uranium often found in uranium ore. It has several radioactive isotopes. Radium-226 decays to radon-222
   Found on http://www.world-nuclear.org/info/inf51.
   
   
7. 
   Radium
   The first substance discovered to give off radiation. Used to treat cancer.
   Found on http://www.cancerhelp.org.uk/glossary.as
   
   
8. 
   Radium
   A radioactive decay product of uranium often found in uranium ore. It has several radioactive isotopes. Radium-226 decays to radon-222.
   Found on http://www.energy-choices.com/index.php?
   
   
9. 
   Radium
   Radium: The celebrated radioactive element discovered by Marie and Pierre Curie in 1898.
   Found on http://www.medterms.com/script/main/art.
   
   
10. 
    radium
    a radioactive element of atomic number 88,and chemical symbol Ra Category: Physics • chemical element:atomic number 88 Category: Chemistry
    Found on http://www.mijnwoordenboek.nl/definition
    
    
11. 
    Radium
    Ra`di·um noun [ New Latin , from Latin radius ray.] (Chemistry) 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 fl ...
    Found on http://www.encyclo.co.uk/webster/R/4
    
    
12. 
    radium
    The celebrated radioactive element discovered by Marie and pierre curie in 1898. ... (12 Dec 1998) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
13. 
    radium
    Ra noun an intensely radioactive metallic element that occurs in minute amounts in uranium ores
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
14. 
    Radium
    `Radium` is a radioactive chemical element which has the symbol `Ra` and atomic number 88. Its appearance is almost pure white, but it readily oxidizes on exposure to air, turning black. Radium is an alkaline earth metal that is found in trace amounts in uranium ores. It is extremely radioactive. Its most stable isotope, `226Ra`, has a half-life of 1602 years and decays into radon gas.
    Found on http://en.wikipedia.org/wiki/Radium
    
    
15. 
    radium
    (Ra) (ra´de-әm) a chemical element, atomic number 88, atomic weight, 226. Radium is highly radioactive and is found in uranium degradation processes. Radium-226 has a half-life of 1622 years. It and its short-lived decay products emit alpha particles, beta particles, and gamma rays. One of the dec...
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
16. 
    Radium
    • (n.) 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 gi...
    Found on http://thinkexist.com/dictionary/meaning
    
    
17. 
    radium
    radioactive chemical element, heaviest of the alkaline-earth metals of main Group IIa of the periodic table. Radium is a silvery white metal that ... [9 related articles]
    Found on http://www.britannica.com/eb/a-z/r/4
    
    
18. 
    radium
    A metallic element, atomic no. 88, extracted in very minute quantities from pitchblende; 226Ra, its longest-lived isotope, is produced as an intermediate in the uranium series by the emission of an particle from thorium-230 (ionium); 226Ra emits particles and gamma rays with a half-life of 1,599 years breaking down to 222Rn; chemically, it is an ...
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19. 
    Radium
    An element often found in uranium ore. It has several radioactive isotopes. Radium-226 decays to Radon-222.
    Found on http://www.sea-us.org.au/glossary.html
    
    
20. 
    radium
    (Ra) Electron shell diagram for radium. Source: Wikipedia A rare, brilliant-white, luminescent, highly radioactive, metallic element having 16 isotopes (4 of them natural) of which radium 226 (Ra²⁶⁶), with a half-life of 1,622 years is the most c...
    Found on http://www.daviddarling.info/encyclopedi
    
    
21. 
    radium
    radium (rā'dēum) [Lat. radius=ray], radioactive metallic chemical element; symbol Ra; at. no. 88; at. wt. 226.0254; m.p. 700°C; b.p. 1,140°C; sp. gr. about 6.0; valence +2. Radium is a lustrous white radioactive metal. It is an alkaline-earth metal; in its chemical properties...
    Found on http://www.infoplease.com/ce6/sci/A08409