• Thumbnail for Caesium
    Caesium (IUPAC spelling; also spelled cesium in American English) is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden...
    93 KB (10,072 words) - 07:28, 12 September 2024
  • Caesium (55Cs) has 41 known isotopes, the atomic masses of these isotopes range from 112 to 152. Only one isotope, 133Cs, is stable. The longest-lived...
    26 KB (1,780 words) - 06:52, 19 September 2024
  • Thumbnail for Caesium-137
    Caesium-137 (137 55Cs ), cesium-137 (US), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products...
    36 KB (3,777 words) - 13:13, 14 September 2024
  • Thumbnail for Caesium standard
    The caesium standard is a primary frequency standard in which the photon absorption by transitions between the two hyperfine ground states of caesium-133...
    21 KB (2,519 words) - 16:55, 10 September 2024
  • Thumbnail for Caesium chloride
    Caesium chloride or cesium chloride is the inorganic compound with the formula CsCl. This colorless salt is an important source of caesium ions in a variety...
    39 KB (3,421 words) - 14:46, 10 September 2024
  • Francium (redirect from Eka-caesium)
    22 minutes. It is the second-most electropositive element, behind only caesium, and is the second rarest naturally occurring element (after astatine)...
    36 KB (4,059 words) - 01:17, 19 August 2024
  • of caesium are known. Caesium oxide may refer to: Caesium suboxides (Cs7O, Cs4O, and Cs11O3) Caesium monoxide (Cs2O, the most common oxide) Caesium peroxide...
    1 KB (144 words) - 16:35, 7 December 2023
  • Thumbnail for Second
    fixed numerical value of the caesium frequency, ΔνCs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9192631770...
    34 KB (3,655 words) - 07:27, 11 September 2024
  • Caesium heptafluoroxenate is an inorganic compound of caesium, and fluorine, and xenon with the chemical formula CsXeF7. Caesium heptafluoroxenate can...
    2 KB (136 words) - 02:21, 16 September 2024
  • Thumbnail for Atomic clock
    the caesium frequency, Δ ν Cs {\displaystyle \Delta \nu _{\text{Cs}}} , the unperturbed ground-state hyperfine transition frequency of the caesium-133...
    153 KB (16,269 words) - 03:16, 16 September 2024