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Protaktiníọ̀m

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
Chemical element with atomic number 91Àdàkọ:SHORTDESC:Chemical element with atomic number 91
Protactinium, 91Pa
Protactinium
Pípè/ˌproʊtækˈtɪniəm/​(PROH-tak-TIN-ee-əm)
Ìhànsójúbright, silvery metallic luster
Ìwúwo átọ̀mùAr, std(Pa)231.03588(1)[1]
Protactinium ní orítábìlì àyè
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Pr
↑
Pa
↓
(Uqu)
thorium ←protactinium →uranium
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
Ìfarahànat 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 of481 kJ/mol
Atomic properties
Oxidation states+2, +3, +4,+5Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.5
Atomic radiusempirical: 163 pm
Covalent radius200 pm
Color lines in a spectral range
Color lines in a spectral range
Spectral lines of protactinium
Other properties
Natural occurrencefrom decay
Crystal structure ​orthorhombic
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
Mainisotopes of protactinium
Iso­topeAbun­danceHalf-life(t1/2)Decay modePro­duct
229Pasyn1.4 dα5.58225Ac
230Pasyn17.4 dε1.310230Th
β−0.563230U
231Pa~100%32760 yα5.149227Ac
232Pasyn1.31 dβ−0.31232U
233Pasyn26.967dβ−0.571233U
234mPatrace1.17minβ−2.29234U
IT0.0694234Pa
234Patrace6.75hβ−0.23234U
Àdàkọ:Category-inline
|references

Protaktiníọ̀m tabiProtactinium jeapilese kemika to ni ami-idamoPa atinomba atomu 91.


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  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 Chemistry88 (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.
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