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Isotopes of caesium - Wikipedia, the free encyclopedia你有這樣喝過嗎~?? Caesium (Cs) or cesium as it is spelled in the United States has 40 known isotopes. The atomic masses of these isotopes range from 112 to 151. Only one isotope, 133Cs, is stable. The longest-lived radioisotopes are 135Cs with a half-life of 2.3 million ye...
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