Astatínì

Astatínì tabi Astatine je apilese kemika alagbararadio pelu ami-idamo At ati nomba atomu 85. Ohun eyi towuwojulo keji ninu awon halojin. Botilejepe astatini nje mimuwaye nitori ijera alagbararadio ninu adanida, nitori short aabo emi kukuru re a le ri ni iye tintin. Astatini koko je mimuwaye latowo Dale R. Corson, Kenneth Ross MacKenzie, ati Emilio Segrè ni 1940. Odun meta koja ki o to dipe ipase astatini bakanna je wiwari ninu awon alumoni aladanida. Titi di aipe opolopo awon iwuwa aladanida ati kemika astatini je nipa sise afiwe mo awon apilese miran. Melo ninu awon isotopu astatini nje lilo bi olufonsita iwonwo alpha ninu awon imulo sayensi, be sini adanwo awon imulo oniwosan fun astatini 211 ti sele. Lowolowo astatini ni apilese aladanida to sowonjulo pelu idiye bi 30g ni o wa ninu igbele Aye.^[2]

Astatínì, ₈₅At

Astatínì
Pípè	/ˈæstətiːn,_ʔtɪn/ ​(AS-tə-teen-,_--tin)
Ìhànsójú	black solid (presumed)
nọ́mbà ìsújọ	[210]
Astatínì ní orí tábìlì àyè
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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson I ↑ At ↓ Ts polonium ← astatínì → radon
Nọ́mbà átọ̀mù (Z)	85
Ẹgbẹ́	group 17 (halogens)
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntì	Post-transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f14 5d10 6s2 6p5
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 32, 18, 7
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	575 K ​(302 °C, ​576 °F)
Ígbà ìhó	610 K ​(337 °C, ​639 °F)
Heat of	40 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[1]
Electronegativity	Pauling scale: 2.2
Covalent radius	150 pm
Van der Waals radius	202 pm
Other properties
Natural occurrence	from decay
Thermal conductivity	1.7 W/(m·K)
Magnetic ordering	no data
CAS Number	7440-68-8
Main isotopes of astatínì
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 210At syn 8.1 h ε, β+ 3.981 210Po α 5.631 206Bi 211At syn 7.2 h
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