Protaktiníọ̀m

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(Àtúnjúwe láti 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)[1]
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
Ẹgbẹ́group n/a
Àyèàyè 7
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì  Actinide
Ìtò ẹ̀lẹ́ktrọ́nù[Rn] 5f2 6d1 7s2
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 states+2, +3, +4, +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.5
Atomic radiusempirical: 163 pm
Covalent radius200 pm
Color lines in a spectral range
Spectral lines of protactinium
Other properties
Natural occurrencefrom decay
Crystal structureorthorhombic
Orthorhombic crystal structure for protactinium
Thermal conductivity47 W/(m·K)
Electrical resistivity177 n Ω·m (at 0 °C)
Magnetic orderingparamagnetic[2]
CAS Number7440-13-3
Main isotopes of protactinium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
229Pa syn 1.4 d α 5.58 225Ac
230Pa syn 17.4 d ε 1.310 230Th
β 0.563 230U
231Pa ~100% 32760 y α 5.149 227Ac
232Pa syn 1.31 d β 0.31 232U
233Pa syn 26.967 d β 0.571 233U
234mPa trace 1.17 min β 2.29 234U
IT 0.0694 234Pa
234Pa trace 6.75 h β 0.23 234U
Àdàkọ:Category-inline
| references

Protaktiníọ̀m tabi Protactinium je apilese kemika to ni ami-idamo Pa ati nomba atomu 91.


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.