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 …

List, data and properties of all known isotopes of Francium. A total of 34 isotopes are known from the chemical element francium, all of which are unstable and therefore radioactive. The …

There are 37 known isotopes of francium ranging in atomic mass from 197 to 233. [3] Francium has seven metastable nuclear isomers. [8] Francium-223 and francium-221 are the only …

Isotopes of Francium. The longest-lived isotope of francium is Fr-223, which has a half-life of only 22 minutes. Thirty four artificial isotopes with atomic masses from 199 to 232 because natural …

Thirty-three isotopes of francium are recognized. The longest lived 223 Fr (Ac, K), a daughter of 227 Ac, has a half-life of 22 min. This is the only isotope of francium occurring in nature.

Further data for naturally occuring isotopes of francium are listed above. This table gives information about some radiosotopes of francium, their masses, their half-lives, their modes of …

Of the 37 radioisotopes of francium, the longest-lived radioisotope is francium-223 with a half-life of 22.00 minutes. The next longest-lived francium isotope is francium-212 with a half-life of …

Francium’s isotopes, with mass numbers ranging from 200 to 232, most commonly undergo alpha- or beta-decay. Here are just a few examples of francium’s decay paths: Francium-223 …

Nearly twenty isotopes of francium have been found. The most stable is francium-223. Isotopes are two or more forms of an element. Isotopes differ from each other according to their mass …

Francium isotopes with masses of 220 AMU and higher can undergo β -decay (the conversion of a neutron to a proton through the emission of an electron) to become radium. Francium-223 is …