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Astatine is a chemical element; it has symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.
Astatine compounds are compounds that contain the element astatine (At). As this element is very radioactive, few compounds have been studied. Less reactive than iodine, astatine is the least reactive of the halogens. [1]
The least stable one is astatine-214m1; its half-life of 265 ns is shorter than those of all ground states except that of astatine-213. [5] Alpha decay energy follows the same trend as for other heavy elements. [10] Lighter astatine isotopes have quite high energies of alpha decay, which become lower as the nuclei become heavier.
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium.
Astatine, is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.
Analytical Chemistry of Technetium, Promethium, Astatine, ... Primordial From decay Synthetic Border shows natural occurrence of the element. ... Wikipedia ® is a ...
Pages in category "Astatine" The following 3 pages are in this category, out of 3 total. This list may not reflect recent changes. ...
This infobox must distinguish between three typical (exemplary) elements: E118 (regular element), E119 and E121. Handling of these element infoboxes is hardcoded in the meta-infobox, set by |number= (Z). Theoretical element: above-header shows; Theoretical element Applied: when element is theoretical (E119 and higher).