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Nẹ́ptúníọ̀m

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
(Àtúnjúwe látiNeptunium)
Chemical element with atomic number 93Àdàkọ:SHORTDESC:Chemical element with atomic number 93
Neptunium, 93Np
Neptunium
Pípè/nɛpˈtjuːniəm/ ​(nep-TEW-nee-əm)
Ìhànsójúsilvery metallic
nọ́mbà ìsújọ[237]
Neptunium ní orítábìlì àyè
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Pm
↑
Np
↓
(Uqt)
uranium ←neptunium →plutonium
Nọ́mbà átọ̀mù(Z)93
Ẹgbẹ́group n/a
Àyèàyè 7
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì Actinide
Ìtò ẹ̀lẹ́ktrọ́nù[Rn] 5f4 6d1 7s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 22, 9, 2
Àwọn ohun ìní ara
Ìfarahànat STPsolid
Ìgbà ìyọ́910 K ​(637 °C, ​1179 °F)
Ígbà ìhó4273 K ​(4000 °C, ​7232 °F)
Kíki (near r.t.)20.45[1] g/cm3
Heat of fusion3.20 kJ/mol
Heat of336 kJ/mol
Molar heat capacity29.46 J/(mol·K)
 pressure
P (Pa)1101001 k10 k100 k
at T (K)21942437    
Atomic properties
Oxidation states+2, +3, +4,[2]+5, +6, +7Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.36
Atomic radiusempirical: 155 pm
Covalent radius190±1 pm
Color lines in a spectral range
Color lines in a spectral range
Spectral lines of neptunium
Other properties
Natural occurrencefrom decay
Crystal structure ​3 forms: orthorhombic,
tetragonal and cubic
Thermal conductivity6.3 W/(m·K)
Electrical resistivity(22 °C) 1.220 µ Ω·m
Magnetic orderingparamagnetic[3]
CAS Number7439-99-8
Mainisotopes of neptunium
Iso­topeAbun­danceHalf-life(t1/2)Decay modePro­duct
235Npsyn396.1 dα5.192231Pa
ε0.124235U
236Npsyn1.54×105 yε0.940236U
β−0.940236Pu
α5.020232Pa
237Npsyn2.144×106ySF & α4.959233Pa
Àdàkọ:Category-inline
| references

Nẹ́ptúníọ̀m tabiNeptunium jeapilese kemika pelu ami-idamoNp atinomba atomu 93.


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[àtúnṣe |àtúnṣe àmìọ̀rọ̀]
  1. ↑Criticality of a237Np Sphere
  2. ↑Np(II), (III) and (IV) have been observed, seeDutkiewicz, Michał S.; Apostolidis, Christos; Walter, Olaf; Arnold, Polly L (2017). "Reduction chemistry of neptunium cyclopentadienide complexes: from structure to understanding". Chem. Sci. 8 (4): 2553–2561. doi:10.1039/C7SC00034K. PMC 5431675. PMID 28553487. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5431675. 
  3. ↑Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
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