Néptunium, 93 Pabaosan (nep-TEW -nee-əm Cingakan silvery metallic Nomor massa [237]
Wilangan atom (Z ) 93 Watek n/a Période période 7 Blok blok-f Konpigurasi éléktron [Rn ] 5f4 6d1 7s2 Éléktron per kulit 2, 8, 18, 32, 22, 9, 2 Pase ring STP padet Titik lebur 912±3 K (639±3 °C, 1182±5 °F) Titik didih 4447 K (4174 °C, 7545 °F) (extrapolated) Kapadetan (nampek s.r. ) alpha: 20.45 g/cm3 [ 1] 3 Panes fusi 5.19 kJ/mol Panes panguapan 336 kJ/mol Kapasitas panes molar 29.46 J/(mol·K) Tekanan uap
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
2194
2437
Paindikan oksidasi +2, +3, +4,[ 2] +5 ampotér ) Kaéléktronégatipan skala Pauling: 1.36 Wasa ionisasi Jeriji atom émpiris: 155 pm Jeriji kovalén 190±1 pm Garis spéktral saking néptuniumStruktur kristal ortorombus Konduktivitas térmal 6.3 W/(m⋅K) Resistivitas listrik 1.220 µΩ⋅m (at 22 °C) bacakan magnétik paramagnetic [ 3] Nomor CAS 7439-99-8 Pangaranan saking planét Néptunus , punika kaparinamain saking déwa segara Romawi Néptunus Panemuan Edwin McMillan miwah Philip H. Abelson (1940)
Kategori:Néptunium pustaka
Néptunium silih tunggil datu kimia antuk simbol Np miwah wilangan atom 93. Logam radioaktip aktinida , néptunium miwah datu transuranik kapertama. Genah nyané ring tabél périodik tepat sesampun uranium , kaaranin mawit planét Uranus , mawinan Neptunus , planét sesampun jaba sisi Uranus. Satunggal atom néptunium ngelah 93 proton miwah 93 éléktron, pitu riantara nyané éléktron valénsi . Logam Néptunium mawarna pérak miwah pangotor ri kala keni udara. Datu kawéntenan ring tiga rupa alotropik miwah ketah nyané nganikayang lima paindikan oksidasi , kakawitin saking +3 nganti +7. Punika radioaktip , nubain , piroforik , miwah prasida kaakumulasi ring balung , sané ngardi pangopénan néptunium mabaya.
↑ Sanchez, Rene G.; Loaiza, David J.; Kimpland, Robert H.; Hayes, David K.; Cappiello, Charlene C.; Myers, William L.; Jaegers, Peter J.; Clement, Steven D.; Butterfield, Kenneth B. "Criticality of a 237 Np Sphere" (PDF) . Japanese Atomic Energy Agency. Kaaksés 2014-08-06 . ↑ 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 .
↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81st edition, CRC press.
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