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Francium-223 is the most stable isotope, with a half-life of 21.8 minutes, [8] and it is highly unlikely that an isotope of francium with a longer half-life will ever be discovered or synthesized. [22] Francium-223 is a fifth product of the uranium-235 decay series as a daughter isotope of actinium-227; thorium-227 is the more common daughter. [23]
However, it would appear that francium perchlorate has been formed, as it coprecipitates with caesium perchlorate, and several other insoluble francium salts are similarly known (Hyde, E.K., Radiochemical Methods for the Isolation of Element 87 (Francium), J. Am. Chem. Soc., 1952, 74, 4181) The article also quotes a value for the Pauling ...
This list is incomplete; you can help by adding missing items. (April 2011) ... francium-215: 86 lead-196m1 <100 uranium-236m1: 100 bismuth-199m2: 100 oxygen-28:
Francium (87 Fr) has no stable isotopes, thus a standard atomic weight cannot be given. Its most stable isotope is 223 Fr with a half-life of 22 minutes, occurring in trace quantities in nature as an intermediate decay product of 235 U. Of elements whose most stable isotopes have been identified with certainty, francium is the most unstable.
How Long Does Food Last In The Fridge Without Power? Temperature is key when figuring out if your food is still in good shape to eat. Generally, foods like meat, poultry, eggs, condiments like ...
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7. Tofu and Pickled Foods. Tofu is another food item that requires refrigeration. Since tofu and other fermented foods like kimchi, pickles, and sauerkraut often retain moisture — especially ...
However, it is possible that some isotopes that are now considered stable will be revealed to decay with extremely long half-lives (as with 209 Bi). This list depicts what is agreed upon by the consensus of the scientific community as of 2023. [1] For each of the 80 stable elements, the number of the stable isotopes is given.