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Cesium is a chemical element with the symbol Cs and atomic number 55. It's The most reactive metal on the periodic table. It's a soft, silvery-golden alkali metal that is liquid at or near room temperature.
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Cesium is a chemical element with the symbol Cs and atomic number 55. It's The most reactive metal on the periodic table. It's a soft, silvery-golden alkali metal that is liquid at or near room temperature.
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