Polonium

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Polonium, 84Po
Polonium
Pípè /pəˈləʊniəm/ (pə-LOH-nee-əm)
Ìhànsójúsilvery
nọ́mbà ìsújọ[209]
Polonium 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
Te

Po

Lv
bismuthpoloniumastatínì
Nọ́mbà átọ̀mù (Z)84
Ẹgbẹ́group 16 (chalcogens)
Àyèàyè 6
Àdìpọ̀Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntì  Post-transition metal
Ìtò ẹ̀lẹ́ktrọ́nù[Xe] 4f14 5d10 6s2 6p4
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 18, 6
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́527 K ​(254 °C, ​489 °F)
Ígbà ìhó1235 K ​(962 °C, ​1764 °F)
Kíki (near r.t.)(alpha) 9.196 g/cm3
(beta) 9.398 g/cm3
Heat of fusionca. 13 kJ/mol
Heat of 102.91 kJ/mol
Molar heat capacity26.4 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K)       (846) 1003 1236
Atomic properties
Oxidation states−2, +2, +4, +5,[1] +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 2.0
Atomic radiusempirical: 168 pm
Covalent radius140±4 pm
Van der Waals radius197 pm
Color lines in a spectral range
Spectral lines of polonium
Other properties
Natural occurrencefrom decay
Crystal structurecubic
Cubic crystal structure for polonium
Thermal expansion23.5 µm/(m·K) (at 25 °C)
Thermal conductivity? 20 W/(m·K)
Electrical resistivity(α) 0.40 µ Ω·m (at 0 °C)
Magnetic orderingnonmagnetic
CAS Number7440-08-6
Main isotopes of polonium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
208Po syn 2.898 y α 5.215 204Pb
ε, β+ 1.401 208Bi
209Po syn 103 y α 4.979 205Pb
ε, β+ 1.893 209Bi
210Po trace 138.376 d α 5.307 206Pb
Àdàkọ:Category-inline
| references

Polonium (pípè /pɵˈloʊniəm/, po-LOH-nee-əm) je ipilese kemika pelu ami-idamo Po ati nomba atomu 84, ti Marie Skłodowska-Curie ati Pierre Curie se awari ni 1898.


Itumosi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Thayer, John S. (2010). "Relativistic Effects and the Chemistry of the Heavier Main Group Elements". Relativistic Methods for Chemists: 78. doi:10.1007/978-1-4020-9975-5_2. ISBN 978-1-4020-9974-8.