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Francium-223 also has a shorter half-life than the longest-lived isotope of each synthetic element up to and including element 105, dubnium. [8] Francium is an alkali metal whose chemical properties mostly resemble those of caesium. [8] A heavy element with a single valence electron, [9] it has the highest equivalent weight of any element. [8]
Why is francium so unstable? The article doesn't explain. Google found me a Prezi presentation ( [1] ), but first off that's not a reliable source for expanding the francium article, and secondly it doesn't explain why many isotopes of related elements, e.g. 238 U with 54 more neutrons than protons, are so much longer lived.
The remaining elements of the group (scandium, yttrium, lutetium) are quite electropositive. They are reactive metals, although this is not obvious due to the formation of a stable oxide layer which prevents further reactions. The metals burn easily to give the oxides, [53] which are white high-melting solids. They are usually oxidized to the ...
The football program was the intercollegiate American football team for Florida Institute of Technology located in the U.S. state of Florida. The team competed in the NCAA Division II and were members of the Gulf South Conference. Florida Tech's first football team was fielded in 2013. They played at the Florida Tech Panther Stadium. The ...
Of elements whose most stable isotopes have been identified with certainty, francium is the most unstable. All elements with atomic number of 106 ( seaborgium ) or greater have most-stable-known isotopes shorter than that of francium, but as those elements have only a relatively small number of isotopes discovered, the possibility remains that ...
UCF 15-12 6-9. Cincinnati 16-12 5-10. Oklahoma State 12-16 4-11. West Virginia 9-19 4-11. This article originally appeared on Lubbock Avalanche-Journal: Texas Tech basketball has lost its edge ...
A group of former Florida State Seminoles basketball players filed a groundbreaking lawsuit against their former coach, Leonard Hamilton, over unpaid promises of NIL compensation that reaches a ...
The CsFr molecule is predicted to have francium at the negative end of the dipole, unlike all known heterodiatomic alkali metal molecules. Francium superoxide (FrO 2) is expected to have a more covalent character than its lighter congeners; this is attributed to the 6p electrons in francium being more involved in the francium–oxygen bonding. [4]