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...
   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 http://www.encyclo.co.uk/visitor-contrib
   
   
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 .] (C...
   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 dar...
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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
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8. 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.encyclo.co.uk/local/21001
   
   
9. 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.
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10. 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
    
    
11. Rubidium
    Rubidium (m {respell|roo|BID|ee-əm}) is a chemical element with the symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other element...
    Found on http://en.wikipedia.org/wiki/Rubidium
    
    
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...
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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
    
    
14. Rubidium
    Rubidium is a metallic element, symbol Rb. It is one of the alkali metals in group 1 of the periodic table. It was discovered spectroscopically in 1860 by the German chemist Robert Bunsen and the German physicist Gustav Kirchhoff, who named the element after the red lines in its spectrum. Metallic r...
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15. rubidium
    (Rb) Type: Term Pronunciation: rū-bid′ē-ŭm Definitions: 1. An alkali element, atomic no. 37, atomic wt. 85.4678; its salts have been used in medicine for the same purposes as the corresponding sodium or potassium salts.
    Found on http://www.medilexicon.com/medicaldictio
    
    
16. rubidium
    Soft, silver-white, metallic element, atomic number 37, relative atomic mass 85.47. It is one of the alkali metals in Group 1 of the periodic table. Reactivity of the alkali metals increases down the group and so rubidium is more reactive than lithium, sodium, and potassium. Rubidium ignites spontaneously in air and reacts violently with water....
    Found on http://www.talktalk.co.uk/reference/ency