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Astatine: 7: 3×10 −20 [i] (8.31 × 10 −4 kg) Not traded. Only under a tenth of microgram of astatine has ever been produced. [44] Most stable isotope has half-life of 8.1 hours. 86: Rn: Radon: 0.00973: 4×10 −13 [i] (1.108 × 10 4 kg) Not traded. Used in brachytherapy until 1960s, [59] currently radon is not used commercially. [60] 87 ...
[j] The total amount of astatine in the Earth's crust (quoted mass 2.36 × 10 25 grams) [108] is estimated by some to be less than one gram at any given time. [8] Other sources estimate the amount of ephemeral astatine, present on earth at any given moment, to be up to one ounce [ 109 ] (about 28 grams).
Astatine compounds (7 P) I. Isotopes of astatine (79 P) Pages in category "Astatine" The following 3 pages are in this category, out of 3 total.
The only comparable element is astatine, whose most stable natural isotope, astatine-219 (the alpha daughter of francium-223), has a half-life of 56 seconds, although synthetic astatine-210 is much longer-lived with a half-life of 8.1 hours. [7] All isotopes of francium decay into astatine, radium, or radon. [7]
Astatine compounds are compounds that contain the element astatine (At). As this element is very radioactive, few compounds have been studied.
This vet-recommended formula is designed to soothe and reduce itchy skin in as little as three to six weeks. It contains a blend of omega-3 oils, which are excellent for supporting skin and coat ...
Usually parameters reproduce the value, and the template adds the SI unit or additional standard text. While the topic is technical, we can strive to make the result readable text, and even verbose. For example, this is why the template writes "(at 0 °C)". For this, you may want to experiment with parameter input too - or propose improvements.
The two of them drove to Cincinnati, bought $100 worth of heroin and shot up together in Hamm’s seven-year-old Toyota Camry. Hamm later blamed his relapse on a bad day at work, among other reasons. “It was just kind of like a storm that fell on me,” he said, describing the pressures he had been under.