It has only one stable isotope, caesium-133. Caesium is mined mostly from pollucite. Caesium-137, a fission product, is extracted from waste produced by nuclear reactors. It has the largest atomic radius …

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Caesium gets its name from the Greek for heavenly blue. Not for its eyes (it's only an element!) but less romantically for the appearance of its emission spectrum in the spectroscope.

Jan 31, 2026 · cesium chemical element Also known as: Cs, caesium Emeritus Professor of Chemistry, Michigan State University, East Lansing, Mich. James L. Dye

May 24, 2022 · Cesium (or caesium) is a soft, shiny, pale gold metal with the chemical symbol Cs and atomic number 55. It is the most electropositive and least electronegative element using the Pauling …

This WebElements periodic table page contains the essentials for the element caesium

History From the Latin word caesius, sky blue. Cesium was discovered spectroscopically in 1860 by Bunsen and Kirchhoff in mineral water from Durkheim. Sources Cesium, an alkali metal, occurs in …

Named from the Latin word meaning sky blue (caesium's spectra contains two prominent blue lines), caesium is a shiny silvery metal with a gold tint.

Caesium was discovered by Robert Wilhelm Bunsen and Gustav Robert Kirchhoff (DE) in 1860. The origin of the name comes from the Latin word caesius meaning sky blue or heavenly blue. It is a very …

Cesium (pronounced as SEE-zee-em), sometimes spelled as caesium, is a highly reactive metal when exposed to air and water. Denoted by the chemical symbol Cs, it belongs to the family of alkali …