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astatine    
n. 石厄

石厄

astatine
n 1: a highly unstable radioactive element (the heaviest of the
halogen series); a decay product of uranium and thorium
[synonym: {astatine}, {At}, {atomic number 85}]


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  • Astatine - Wikipedia
    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 | Symbol, Atomic Number, Uses, Properties, Facts | Britannica
    Astatine is a radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (VIIa) of the periodic table Because astatine has no stable or long-lived isotopes, it was given its name from the Greek word astatos, meaning “unstable ”
  • Astatine Facts - The Rarest Natural Element
    Astatine (At) is a rare and highly radioactive element with atomic number 85 It is part of the halogen group (Group 17) in the periodic table, which also includes fluorine, chlorine, bromine, and iodine Unlike the other halogens, astatine has no stable isotopes
  • Astatine - Element information, properties and uses | Periodic Table
    A mass spectrometer has been used to confirm that astatine behaves chemically like other halogens, particularly iodine Astatine has no known biological role It is toxic due to its radioactivity Astatine can be obtained in a variety of ways, but not in weighable amounts
  • Astatine Element Facts - chemicool. com
    Astatine is highly radioactive and is only available in tiny quantities Its properties are inferred from its position in the periodic table and by studying its chemistry in extremely dilute solutions Like the other halogens, astatine would be expected to form salts with metals such as sodium
  • Astatine | At (Element) - PubChem
    Chemical element, Astatine, information from authoritative sources Look up properties, history, uses, and more
  • 8. 13. 7: Chemistry of Astatine (Z=85) - Chemistry LibreTexts
    Astatine is the last of the known halogens and was synthesized in 1940 by Corson and others at the University of California It is radioactive and its name, from the Greek astatos, means "unstable"
  • Astatine Facts, Symbol, Discovery, Properties, Uses
    Astatine (pronounced as AS-teh-teen) is a non-metal represented by the chemical symbol At, and belongs to the family of halogens [1] It is not diatomic as it contains only one atom
  • Astatine, Chemical Element - uses, elements, metal, number, name . . .
    Astatine is a member of the halogen family, elements in Group 17 (VIIA) of the periodic table It is one of the rarest elements in the universe Scientists believe that no more than 25 grams exist on the Earth's surface All isotopes of astatine are radioactive and decay into other elements
  • Astatine - Simple English Wikipedia, the free encyclopedia
    Astatine is a radioactive, chemical element Its atomic number is 85, and its atomic weight is 210 It is part of the Group 17 (halogens) on the periodic table of elements All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8 3 hours





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