Àdàkọ:Infobox protactinium

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Protactinium, 91Pa
Protactinium
Pípè /ˌprtækˈtɪniəm/ (PROH-tak-TIN-ee-əm)
Ìhànsójúbright, silvery metallic luster
Ìwúwo átọ̀mù Ar, std(Pa)231.03588(1)Àdàkọ:CIAAW2013
nọ́mbà ìsújọPa:
Protactinium 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
Pr

Pa

(Uqu)
thoriumprotactiniumuranium
Nọ́mbà átọ̀mù (Z)91
Ẹgbẹ́n/a
Àyèàyè 7
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntìÀdàkọ:Infobox element/category format
Ìtò ẹ̀lẹ́ktrọ́nùÀdàkọ:Infobox element/symbol-to-electron-configuration
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 20, 9, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́1841 K ​(1568 °C, ​2854 °F)
Ígbà ìhó? 4300 K ​(? 4027 °C, ​? 7280 °F)
Kíki (near r.t.)15.37 g/cm3
Heat of fusion12.34 kJ/mol
Heat of 481 kJ/mol
Atomic properties
Oxidation statesÀdàkọ:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.5
Atomic radiusempirical: 163 pm
Covalent radius200 pm
Àdàkọ:Infobox element/spectral lines
Other properties
Natural occurrenceÀdàkọ:Infobox element/symbol-to-occurrence
Crystal structureÀdàkọ:Infobox element/crystal structure
Thermal conductivity47 W/(m·K)
Electrical resistivity177 n Ω·m (at 0 °C)
Magnetic orderingparamagnetic[1]
CAS Number7440-13-3
Main isotopes of protactinium
Àdàkọ:Infobox element/isotopes table
Àdàkọ:Category-inline
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References

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.