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rubidium

noun

ru·​bid·​i·​um rü-ˈbi-dē-əm How to pronounce rubidium (audio)
: a soft silvery metallic element of the alkali metal group that reacts violently with water and bursts into flame spontaneously in air see Chemical Elements Table

Example Sentences

Recent Examples on the Web However, the trap that holds the rubidium atoms can be tuned to efficiently suck energy out of them. Chris Lee, Ars Technica, 7 Feb. 2022 Physicist Ron Folman of Ben-Gurion University of the Negev in Israel and his colleagues re-created the Stern-Gerlach experiment using not individual atoms but a cloud of rubidium atoms. Davide Castelvecchi, Scientific American, 8 Feb. 2022 In a media statement, the company stated that their rubidium atomic clock would deliver a frequency stability of about 2x10-14 over averaging intervals of 10,000 seconds. Jennifer Kite-powell, Forbes, 18 Sep. 2021 The team loaded 200 million rubidium atoms into their vacuum chamber and passed laser light through all the optics components, making the light collide with the atoms. Karmela Padavic-callaghan, Wired, 7 Sep. 2021 In that vacuum chamber, 18 tiny collections of rubidium atoms — about 10,000 to a group — are arranged in a line and cooled to phenomenally low temperatures, a fraction of a degree above absolute zero. Quanta Magazine, 7 Sep. 2021 Atoms of rubidium, a heavy cousin of the more familiar lithium and sodium, are appealing because their internal quantum states can be set and controlled by light. Gabriel Popkin, Science | AAAS, 3 June 2021 The physicists used rubidium atoms that had been cooled to temperatures about a millionth of a degree Kelvin above absolute zero as a starting point for their plasma—an extremely cold temperature instead of the extremely hot one inside the sun. Karmela Padavic-callaghan, Wired, 17 Mar. 2021 The researchers reported that the rubidium atoms spent, on average, 0.61 milliseconds inside the barrier, in line with Larmor clock times theoretically predicted in the 1980s. Quanta Magazine, 20 Oct. 2020 See More

Word History

Etymology

New Latin, from Latin rubidus red, from rubēre

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of rubidium was in 1861

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