Skip to main content
Select Source:

rubidium

rubidium (symbol Rb) Silver-white metallic element of the alkali metals (group I of the periodic table). It ignites spontaneously in air and can be liquid at room temperature. It was discovered in 1861 by the German chemist Robert Bunsen and the German physicist Gustav Kirchhoff. The element has few commercial uses; small amounts are used in photoelectric cells, vacuum-tube filaments, and batteries. It chemically resembles sodium but is more reactive. Properties: at. no.37; r.a.m. 85.4678; r.d. 1.53; m.p. 38.89°C (102°F); b.p. 688°C (1270°F); most common isotope Rb85 (72.15%).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"rubidium." World Encyclopedia. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"rubidium." World Encyclopedia. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/rubidium

"rubidium." World Encyclopedia. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/rubidium

Periodic Table of the Elements: Rubidium

Periodic Table of the Elements: Rubidium

Periodic Table of the Elements: Rubidium
Atomic Number: 37
Atomic Symbol: Rb
  Rubidium
Atomic Weight: 85.4678
Electron Configuration: 2 · 8 · 18 8 · 1

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Periodic Table of the Elements: Rubidium." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"Periodic Table of the Elements: Rubidium." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/periodic-table-elements-rubidium

"Periodic Table of the Elements: Rubidium." The Columbia Encyclopedia, 6th ed.. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/periodic-table-elements-rubidium