Look up: rubidium

1. 
   rubidium
   [n] - a soft silvery metallic element of the alkali metal group
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. 
   Rubidium
   Rubidium is a soft and highly reactive member of the alkali group of metals. It is widely distributed throughout nature, but only occurs in small amounts, the main source being carnallite, the hydrated chloride of magnesium and potassium. The metal is obtained by the electrolysis of the fused halide, although it can be obtained on a laboratory scal...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
3. 
   rubidium
   chemical element:atomic number 37 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
4. 
   rubidium
   One of the alkali earth metals, can be used to substitute for potassium in some ion flux experiments.
   Found on
   
   
5. 
   Rubidium
   Ru·bid'i·um noun [ New Latin , from Latin rubidus red, from rubere to be red. So called from two dark red spectroscopic lines by means of which it was discovered in the lepidolite from Rozena, Moravia. See Rubicund .] (Chemistry) A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white me ...
   Found on http://www.encyclo.co.uk/webster/R/101
   
   
6. 
   rubidium
   <chemistry, element> A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. ... Origin: NL, fr. L. Rubidus red, fr. Rubere to be red. So called from two dark red spectroscopic lines by means of which it was ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
7. 
   rubidium
   Rb noun a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
8. 
   Rubidium
   `Rubidium` is a chemical element with the symbol `Rb` and atomic number 37. Rb is a soft, silvery-white metallic element of the alkali metal group. Rb-87, a naturally occurring isotope, is (slightly) radioactive. Rubidium is very soft and highly reactive, with properties similar to other elements in group 1, like rapid oxidation in air.
   Found on http://en.wikipedia.org/wiki/Rubidium
   
   
9. 
   rubidium
   (Rb) (roo-bid´e-әm) a chemical element, atomic number 37, atomic weight 85.47. rubidium 82 a radioactive isotope of rubidium having a half-life of 1.273 minutes and decaying by positron emission. It is used as a tracer in positron emission tomography.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
10. 
    Rubidium
    • (n.) A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Symbol Rb. Atomic weight, 85.2.
    Found on http://thinkexist.com/dictionary/meaning
    
    
11. 
    rubidium
    chemical element of Group 1 (also called Group Ia) in the periodic table, the alkali metal group. Rubidium is the second most reactive metal and is ... [8 related articles]
    Found on http://www.britannica.com/eb/a-z/r/75
    
    
12. 
    rubidium
    (Rb) Rubidium Credit: RSC A soft, silvery-white, metallic element belonging to the family of alkali metals. It was discovered in 1861 in Heidelberg by Robert Bunsen and Gustav Kirchhoff, by spectroscopic examination of the mineral lepidolite; its name is derived from th...
    Found on http://www.daviddarling.info/encyclopedi
    
    
13. 
    rubidium
    rubidium (rOObid'ēum) , metallic chemical element; symbol Rb; at. no. 37; at. wt. 85.4678; m.p. 38.89°C; b.p. 686°C; sp. gr. 1.53 at 20°C; valence +1. Rubidium is a very soft silver-white metal. One of the alkali metals, it is directly below potassium in Group 1 of the periodic...
    Found on http://www.infoplease.com/ce6/sci/A08426