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Qu'est-ce (qui) est rubidium - définition

CHEMICAL ELEMENT WITH SYMBOL RB AND ATOMIC NUMBER 37

Element 37; Nipigin; Rb (element); Rubidium compounds; Rubidium compound; Rubidium oxalate; Compounds of rubidium; History of rubidium

Rubidium

·noun 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.

rubidium

[r?'b?d??m]

¦ noun the chemical element of atomic number 37, a rare soft silvery reactive metal of the alkali metal group. (Symbol: Rb)

Origin

C19: mod. L., from L. rubidus 'red' (with ref. to lines in its spectrum).

Rubidium

Rubidium is the chemical element with the symbol Rb and atomic number 37. It is very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium.

https://en.wikipedia.org/wiki/Rubidium

Wikipédia

Rubidium

Rubidium is the chemical element with the symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. Rubidium is the first alkali metal in the group to have a density higher than water. On Earth, natural rubidium comprises two isotopes: 72% is a stable isotope ⁸⁵Rb, and 28% is slightly radioactive ⁸⁷Rb, with a half-life of 48.8 billion years—more than three times as long as the estimated age of the universe.

German chemists Robert Bunsen and Gustav Kirchhoff discovered rubidium in 1861 by the newly developed technique, flame spectroscopy. The name comes from the Latin word rubidus, meaning deep red, the color of its emission spectrum. Rubidium's compounds have various chemical and electronic applications. Rubidium metal is easily vaporized and has a convenient spectral absorption range, making it a frequent target for laser manipulation of atoms. Rubidium is not a known nutrient for any living organisms. However, rubidium ions have similar properties and the same charge as potassium ions, and are actively taken up and treated by animal cells in similar ways.

https://en.wikipedia.org/wiki/Rubidium

Exemples du corpus de texte pour rubidium

1. Porto and colleagues have coaxed pairs of super–cold rubidium atoms to repeatedly swap positions, a feat that could make them useful for storing and processing data in quantum computers.

2. In 1''5 Eric Cornell and Carl Wiemann, scientists at the University of Colorado in Boulder, created the condensation described by Einstein by using a gas of the element rubidium.