| slovo | definícia |
rubidium
(encz) | rubidium,rubidium n: Zdeněk Brož |
rubidium
(czen) | rubidium,Rb[chem.] [zkr.] Michal Ambrož |
rubidium
(czen) | rubidium,rubidiumn: Zdeněk Brož |
Rubidium
(gcide) | Rubidium \Ru*bid"i*um\, n. [NL., fr. L. rubidus red, fr. 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.] (Chem.)
A rare metallic element of the alkali metal series, atomic
number 37. 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, 85.48.
[1913 Webster] |
rubidium
(wn) | rubidium
n 1: 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 [syn: rubidium,
Rb, atomic number 37] |
rubidium
(elements) | rubidium
Symbol: Rb
Atomic number: 37
Atomic weight: 85.47
Soft silvery metallic element, belongs to group 1 of the periodic table.
Rb-97, the naturally occurring isotope, is radioactive. It is highly
reactive, with properties similar to other elements in group 1, like
igniting spontaneously in air. Discovered spectroscopically in 1861 by
W.
Bunsen and G.R. Kirchoff.
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| | podobné slovo | definícia |
rubidium-strontium dating
(encz) | rubidium-strontium dating, n: |
Rubidium
(gcide) | Rubidium \Ru*bid"i*um\, n. [NL., fr. L. rubidus red, fr. 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.] (Chem.)
A rare metallic element of the alkali metal series, atomic
number 37. 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, 85.48.
[1913 Webster] |
rubidium-strontium dating
(wn) | rubidium-strontium dating
n 1: geological dating based on the proportions of radioactive
rubidium into its decay product strontium; radioactive
rubidium has a half-life of 47,000,000,000 years |
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