astatine - 217 is the daughter element produced in the alpha decay of francium-221.
astatine - 217 is the daughter element produced in the alpha decay of francium-221.
in the alpha decay of francium-221 what daughter element is produced?
astatine - 217
Na
Na
francium-221 has a half-life of 4.8 minutes. it is the ninth product of the neptunium decay series as a daughter isotope of actinium-225. francium-221 then decays into astatine-217 by alpha decay (6.457 mev decay energy).









































the least stable ground state isotope is francium-215, with a half-life of 0.12 μs: it undergoes a 9.54 mev alpha decay to astatine-211. its metastable isomer, francium-215m, is less stable still, with a half-life of only 3.5 ns.









































section::::applications.









































due to its instability and rarity, there are no commercial applications for francium. it has been used for research purposes in the fields of chemistry
francium