Caesium (IUPAC spelling; cesium in American English) is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden alkali... 88 KB (9,727 words) - 22:56, 14 April 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... 27 KB (1,862 words) - 09:53, 21 January 2024 |
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... 35 KB (3,745 words) - 10:55, 14 April 2024 |
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 (2,486 words) - 18:07, 9 July 2023 |
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 (4,002 words) - 09:39, 18 April 2024 |
Second (redirect from 9192631770 cycles of a Caesium atomic clock) 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 (3,637 words) - 11:40, 28 March 2024 |
Caesium heptafluoroxenate is an inorganic compound of caesium, and fluorine, and xenon with the chemical formula CsXeF7. Caesium heptafluoroxenate can... 2 KB (135 words) - 13:16, 5 March 2024 |
Atomic clock (section Caesium) the caesium frequency, Δ ν Cs {\displaystyle \Delta \nu _{\text{Cs}}} , the unperturbed ground-state hyperfine transition frequency of the caesium-133... 144 KB (15,445 words) - 19:57, 15 April 2024 |