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Definition of «caesium»

Caesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-white alkali metal with a melting point of 28°C (83°F), making it one of the few metals that can be liquid at or near room temperature. Caesium was discovered in 1860 by Robert Bunsen and Gustav Kirchhoff, who found it in mineral water from a salt spring in Bad Dürkheim, Germany. It is widely used in various applications such as atomic clocks, electronic devices, and photography due to its ability to be easily ionized and its large number of energy levels.

Usage examples

  1. Caesium is a chemical element with the symbol Cs and atomic number 55.
  2. Caesium is an alkali metal in the periodic table, positioned below rubidium and above francium.
  3. Caesium is highly reactive and is considered one of the most reactive elements.
  4. Caesium is commonly used in atomic clocks due to its exceptional accuracy in measuring time.
  5. Caesium-137 is a radioactive isotope of caesium, which is used in medical radiation therapy and industrial applications.
  6. Caesium vapor is used in various types of high-powered electric devices, such as electric propulsion systems for spacecraft.
  7. Caesium iodide (CsI) and caesium sulfate (Cs2SO4) are commonly used in scintillation detectors for detecting radiation.
  8. Caesium is sometimes used as a catalyst in certain organic reactions in chemistry.
  9. Caesium compounds are used in the production of special glass materials with high refractive indices.
  10. Caesium salts are occasionally utilized in fireworks to produce vibrant violet colors.

Sentences with «caesium»

  • Using an interferometer, the team split a beam of caesium atoms into two. (newscientist.com)
  • In October 2004, the first quantum memory component was built from a string of caesium atoms. (newscientist.com)
  • Our car came in striking Caesium Blue — one of four launch colours — and as well as seeing it static in the studio, we also watched it do a few laps of a private courtyard. (autoexpress.co.uk)
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See also

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