ମୁଖ୍ୟ ସୂଚୀ ଦେଖିବେ

ଆଷ୍ଟାଟାଇନ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Atପରମାଣୁ କ୍ରମାଙ୍କ ୮୫ ଅଟେ ।

Astatine,  85At
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକastatine, At
Appearanceunknown, but probably a black solid; possibly metallic in appearance
ଉଚ୍ଚାରଣ /ˈæstətn/ AS-tə-teen
or /ˈæstətɪn/ AS-tə-tin
Astatine in the periodic table
Hydrogen (other non-metal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (other non-metal)
Nitrogen (other non-metal)
Oxygen (other non-metal)
Fluorine (halogen)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (other non-metal)
Sulfur (other non-metal)
Chlorine (halogen)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (other non-metal)
Bromine (halogen)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (halogen)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanoid)
Cerium (lanthanoid)
Praseodymium (lanthanoid)
Neodymium (lanthanoid)
Promethium (lanthanoid)
Samarium (lanthanoid)
Europium (lanthanoid)
Gadolinium (lanthanoid)
Terbium (lanthanoid)
Dysprosium (lanthanoid)
Holmium (lanthanoid)
Erbium (lanthanoid)
Thulium (lanthanoid)
Ytterbium (lanthanoid)
Lutetium (lanthanoid)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (halogen)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinoid)
Thorium (actinoid)
Protactinium (actinoid)
Uranium (actinoid)
Neptunium (actinoid)
Plutonium (actinoid)
Americium (actinoid)
Curium (actinoid)
Berkelium (actinoid)
Californium (actinoid)
Einsteinium (actinoid)
Fermium (actinoid)
Mendelevium (actinoid)
Nobelium (actinoid)
Lawrencium (actinoid)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
I

At

Uus
poloniumastatineradon
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)85
ଶ୍ରେଣୀ, ବ୍ଳକgroup 17 (halogens), p-block
ପର୍ଯ୍ୟାୟperiod 6
ମୌଳିକ ପ୍ରକାର  halogen, sometimes classified as a metalloid (disputed)
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)(210)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ[Xe] 4f14 5d10 6s2 6p5
per shell
2, 8, 18, 32, 18, 7
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥାsolid
ଗଳନାଙ୍କ575 K ​(302 °C, ​576 °F)
ସ୍ଫୁଟନାଙ୍କ610 K ​(337 °C, ​639 °F)
Heat of (At2) 54.39 kJ/mol
 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
ElectronegativityPauling scale: 2.2
Covalent radius150 pm
Van der Waals radius202 pm
Miscellanea
Thermal conductivity1.7 W/(m·K)
Magnetic orderingno data
CAS Number7440-68-8
ଇତିହାସ
ଆବିଷ୍କାରDale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Most stable isotopes of astatine
iso NA half-life DM DE (MeV) DP
209At syn 5.41 h β+ 3.486 209Po
α 5.758 205Bi
210At syn 8.1 h β+ 3.981 210Po
α 5.632 206Bi
211At syn 7.21 h ε 0.786 211Po
α 5.983 207Bi
| references

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  • Kugler, H K; Keller, C (1985). 'At, Astatine', system no. 8a. Gmelin handbook of inorganic and organometallic chemistry. 8 (8th ed.). Springer-Verlag. ISBN 3-540-93516-9.
  • Lavrukhina, A K; Pozdnyakov, A A (1966). Аналитическая химия технеция, прометия, астатина и франция (in Russian). Nauka. Unknown parameter |trans_title= ignored (help)CS1 maint: Unrecognized language (link)
  • Zuckerman, J J; Hagen, A P (1989). Inorganic Reactions and Methods, the Formation of Bonds to Halogens. John Wiley & Sons. ISBN 978-0-471-18656-4.

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