Caesium
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Caesium is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that a
Cesium
High-purity caesium stored in argon
Caesium crystals (golden) compared to rubidium crystals (silvery)
Monatomic caesium halide wires grown inside double-wall carbon nanotubes (TEM image).
Caesium-137
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Caesium-137, cesium-137, or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isot
Caesium
…stable element, with a value of 0.79 on the Pauling scale. 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 of all elements whose radii have been measured…
A sealed caesium-137 radioactive source
Radiocaesium blood irradiator