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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]
As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars.
If anyone finds a reference specifically discussing the issue of the electronegativity of francium, please add it!. --Itub 08:47, 12 April 2007 (UTC) Alright, quick update regarding previous concerns: There is so little reliable information about francium compounds that it doesn't make sense to make a compound section.
The abundance of the chemical elements is a measure of the occurrences of the chemical elements relative to all other elements in a given environment. Abundance is measured in one of three ways: by mass fraction (in commercial contexts often called weight fraction), by mole fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases), or by volume fraction.
Why is francium so unstable? The article doesn't explain. Google found me a Prezi presentation (), 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.
Why are flights so expensive in 2023? Flights cost even more in early 2023 than they do now. Factors such as fuel costs, staffing shortages, aging IT infrastructure and hidden fees all contribute ...
Image credits: Major-Check-1953 We live in a world that is constantly on its feet and just keeps evolving eternally, with a rise and fall of inflation along with the changing economy.
Rolex watches, which aren’t known for their affordability, are getting even more expensive this year with the soaring price of gold to blame.. Prices on some of the Swiss company’s gold ...