Template:Infobox astatine

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Astatine, 85At
Astatine
Pronunciation/ˈæstətn, -tɪn/ (AS-tə-teen, -tin)
Appearanceunkent, but probably metallic
Mass number[210]
Astatine in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
I

At

Uus
poloniumastatineradon
Atomic nummer (Z)85
Groupgroup 17 (halogens)
Periodperiod 6
Blockp-block
Element category  Metalloid
Electron confeeguration[Xe] 4f14 5d10 6s2 6p5
Electrons per shell2, 8, 18, 32, 18, 7
Pheesical properties
Phase at STPsolit
Meltin pynt575 K ​(302 °C, ​576 °F)
Bylin pynt610 K ​(337 °C, ​639 °F)
Density (near r.t.)(At2) 6.2–6.5 (predictit)[1] g/cm3
Heat o vapourisation(At2) 54.39 kJ/mol
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 361 392 429 475 531 607
Atomic properties
Oxidation states−1, +1, +3, +5, +7[2]
ElectronegativityPauling scale: 2.2
Covalent radius150 pm
Van der Waals radius202 pm
Ither properties
Thermal conductivity1.7 W/(m·K)
CAS Nummer7440-68-8
History
DiskiveryDale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Main isotopes o astatine
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
209At syn 5.41 h β+ 209Po
α 205Bi
210At syn 8.1 h β+ 210Po
α 206Bi
211At syn 7.21 h ε 211Po
α 207Bi
| references
style="text-align:left"|
in calc from C diff report ref
C 302
K 575 575 0
F 576 576 0
WD Edit this at Wikidata
input C: 302, K: 575, F: 576
comment
style="text-align:left"|
in calc from C diff report ref
C 337
K 610 610 0
F 639 639 0
WD 503 kelvin Edit this at Wikidata [5]
input C: 337, K: 610, F: 639
comment

References

Thir references will appear in the airticle, but this list appears anerly on this page.
  1. Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the properties of the 113–120 transactinide elements". The Journal of Physical Chemistry. ACS Publications. 85 (9): 1177–86. doi:10.1021/j150609a021.
  2. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. p. 28. ISBN 0080379419.
  3. Hermann, Andreas; Hoffmann, Roald; Ashcroft, N. W. (2013). "Condensed Astatine: Monatomic and Metallic". Physical Review Letters. 111 (11). doi:10.1103/PhysRevLett.111.116404.
  4. Rothe, S.; Andreyev, A. N.; Antalic, S.; Borschevsky, A.; Capponi, L.; Cocolios, T. E.; De Witte, H.; Eliav, E.; et al. (2013). "Measurement of the first ionization potential of astatine by laser ionization spectroscopy". Nature Communications. 4: 1835–. doi:10.1038/ncomms2819. PMC 3674244. PMID 23673620.
  5. "Estimation Chemical Form Boiling Point Elementary Astatine by Radio Gas Chromatography"; page: 201–203; date o publication: 1982; volume: 31.