Nẹ́ptúníọ̀m

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(Àtúnjúwe láti Neptunium)
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Neptunium, 93Np
Neptunium2.jpg
Neptunium
Pípè /nɛpˈtjniəm/ (nep-TEW-nee-əm)
Ìhànsójúsilvery metallic
nọ́mbà ìsújọ[237]
Neptunium 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
Pm

Np

(Uqt)
uraniumneptuniumplutonium
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
Ìfarahàn at 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 of 336 kJ/mol
Molar heat capacity29.46 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2194 2437        
Atomic properties
Oxidation states+2, +3, +4,[2] +5, +6, +7 Àdàkọ: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
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
Main isotopes of neptunium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
235Np syn 396.1 d α 5.192 231Pa
ε 0.124 235U
236Np syn 1.54×105 y ε 0.940 236U
β 0.940 236Pu
α 5.020 232Pa
237Np syn 2.144×106 y SF & α 4.959 233Pa
Àdàkọ:Category-inline
| references

Nẹ́ptúníọ̀m tabi Neptunium je apilese kemika pelu ami-idamo Np ati nomba atomu 93.


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Criticality of a 237Np Sphere
  2. Np(II), (III) and (IV) have been observed, see Dutkiewicz, 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.