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[mass noun] The chemical element of atomic number 55, a soft, silvery, extremely reactive metal. It belongs to the alkali metal group and occurs as a trace element in some rocks and minerals.
- ‘Fifteen years after the disaster, Bulgaria still suffers from the effects - mostly in the form of increased levels in the environment of cesium and strontium.’
- ‘However, water-soluble rubidium, cesium, thallium, and silver minerals are virtually nonexistent and should pose no complication.’
- ‘While cesium and strontium, the two materials found in the generators, cannot be used to make nuclear weapons, they could contaminate large areas if combined with explosives.’
- ‘These elements - lithium, sodium, potassium, rubidium, cesium and francium - all react with water to give solutions that change the color of a vegetable dye from red to blue.’
- ‘We breathe air polluted with lead, carbon monoxide and nitrogen oxides from car exhausts, sulphur dioxide from chimney flues, radioactive iodine, caesium and a host of other radionuclides from the flues of nuclear installations.’
- ‘They mapped the patterns made by known elements and discovered many new ones, including rubidium and cesium.’
- ‘The same cannot be said of logarithms or the reactivity of caesium.’
- ‘Once ingested, radioactive plutonium, cesium and strontium atoms morph into agents of death in the body, stealthily emitting radiation internally and constantly bombarding the genes of nearby cells.’
- ‘Researchers are particularly interested in zeolites filled with metal atoms such as cesium.’
- ‘They discovered two new elements, caesium and rubidium in the course of their investigations.’
- ‘Food irradiation uses gamma rays from cesium - 137 and cobalt - 60, which are capable of causing chemical changes in these foods.’
- ‘We're using our big laser system to study the detailed atomic physics of xenon with other alkalis besides rubidium, such as cesium and potassium.’
- ‘Reasonable permeation free energy profiles are obtained for potassium, rubidium, and cesium; binding wells are shallow and the central barrier is small.’
- ‘Later, the radioactive cesium or strontium is trapped in the zeolite and is excreted.’
- ‘They also can form condensates out of numerous different elements, including sodium, potassium, lithium, cesium, hydrogen and helium.’
- ‘The alkali metals are silver colored except for cesium, which is pale gold.’
- ‘Those that produce a measurable spectrum when subjected to flame include, but are not limited to, lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, zinc, and cadmium.’
- ‘Because of the very slow natural process of decontamination of soil tainted by strontium 90, cesium 137, and plutonium, the agricultural consequences will persist for forty to fifty years.’
- ‘In addition to this, the government-sponsored nuclear industry regularly released enormous quantities of radioactive Iodine, cesium, and strontium into the atmosphere just to see what might happen.’
- ‘The University of Southampton used mass spectrometry to probe samples for plutonium, radium and caesium.’
Mid 19th century: from Latin caesius greyish-blue (because it has characteristic lines in the blue part of the spectrum).
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