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Caesium (55 Cs) has 41 known isotopes, the atomic masses of these isotopes range from 112 to 152. Only one isotope, 133 Cs, is stable. The longest-lived radioisotopes are 135 Cs with a half-life of 1.33 million years, 137 Cs with a half-life of 30.1671 years and 134 Cs with a half-life of 2.0652 years. All other isotopes have half-lives less ...
The radioactive 135 Cs has a very long half-life of about 2.3 million years, the longest of all radioactive isotopes of caesium. 137 Cs and 134 Cs have half-lives of 30 and two years, respectively. 137 Cs decomposes to a short-lived 137m Ba by beta decay, and then to nonradioactive barium, while 134 Cs transforms into 134 Ba directly. The ...
Caesium fluoride has the halite structure, which means that the Cs + and F − pack in a cubic closest packed array as do Na + and Cl − in sodium chloride. [3] Unlike sodium chloride, caesium fluoride's anion is smaller than its cation, so it is the anion size that sterically inhibits larger coordination numbers than six under normally ...
Caesium peroxide or cesium peroxide is an inorganic compound of caesium and oxygen with the chemical formula Cs 2 O 2. It can be formed from caesium metal by adding a stoichiometric amount in ammonia solution, or oxidizing the solid metal directly. [1] 2 Cs + O 2 → Cs 2 O 2. It can also be formed by the thermal decomposition of caesium ...
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100: Vicia faba: Horse Bean [1]: 891 ... Can form alloys of silver-gold-copper [10] As: 100: Agrostis capillaris L. Common Bent Grass, Browntop. ... Also Cs, Sr, U ...