మూస:Infobox astatine

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ఆస్టాటైన్, 00At
ఆస్టాటైన్
Pronunciation/ˈæstətn, -tɪn/ (ASS--teen-,_--tin)
Appearanceunknown, but probably metallic
Mass number[210]
ఆస్టాటైన్ in the periodic table
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Gold Mercury (element) Thallium Lead 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
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పొలోనియంఆస్టాటైన్రేడాన్
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 6
Block  p-block
Electron configuration[Xe] 4f14 5d10 6s2 6p5
Electrons per shell2, 8, 18, 32, 18, 7
Physical properties
Phase at STPsolid
Melting point575 K ​(302 °C, ​576 °F)
Boiling point610 K ​(337 °C, ​639 °F)
Density (near r.t.)(At2) 6.2–6.5 (predicted)[1] g/cm3
Heat of vaporization(At2) 54.39 kJ/mol
Vapor pressure
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
Other properties
Natural occurrencefrom decay
Thermal conductivity1.7 W/(m⋅K)
CAS Number7440-68-8
History
DiscoveryDale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Isotopes of ఆస్టాటైన్
Template:infobox ఆస్టాటైన్ isotopes does not exist
 Category: ఆస్టాటైన్
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References

  1. Bonchev, Danail; Kamenska, Verginia (1981). "Predicting the properties of the 113–120 transactinide elements". The Journal of Physical Chemistry. 85 (9). ACS Publications: 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.