Neptunium

Neptunium (Np)

grundämne
Atomnummer93
Atommassa237
masstal219
Grupp
Period7
Blockf
Protoner93 p+
Neutroner126 n0
Electrons93 e-
Animated Bohrs atommodell of Np (Neptunium)

Egenskaper

fysisk egenskap
atomradie
175 pm
molvolym
21,1 cm³/mol
kovalent radie
171 pm
Metallic Radius
ionic radius
110 pm
Crystal Radius
124 pm
Van der Waalsradie
239 pm
densitet
20,2 g/cm³
energi
proton affinity
Elektronaffinitet
joniseringsenergi
6,2655 eV/particle
joniseringsenergi of Np (Neptunium)
ångbildningsvärme
336 kJ/mol
smältvärme
9,6 kJ/mol
Bildningsentalpi
464,8 kJ/mol
Electrons
electron shell2, 8, 18, 32, 22, 9, 2
Bohrs atommodell: Np (Neptunium)
valenselektron2
Elektronformel: Np (Neptunium)
elektronkonfiguration[Rn] 5f4 6d1 7s2
Enhanced Bohrs atommodell of Np (Neptunium)
Orbital Diagram of Np (Neptunium)
oxidationstal2, 3, 4, 5, 6, 7
elektronegativitet
1.3
Electrophilicity
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
Smältpunkt
917,15 K
critical pressure
critical temperature
trippelpunkt
Visual
färg
Silver
appearancesilvery metallic
Brytningsindex
materialegenskap
Värmeledningsförmåga
termisk expansion
molar heat capacity
Specifik värmekapacitet
heat capacity ratio
electrical properties
typeConductor
elektrisk konduktivitet
0,83 MS/m
resistivitet
0,0000012 m Ω
supraledare
magnetism
type
magnetisk susceptibilitet (Mass)
magnetisk susceptibilitet (Molar)
magnetisk susceptibilitet (Volume)
magnetic ordering
Curiepunkten
Néel temperature
Structure
KristallstrukturEnkelt ortorombiskt (ORC)
Gitterkonstant
4,72 Å
Lattice Anglesπ/2, π/2, π/2
mekanisk materialegenskap
hårdhet
Kompressibilitet
skjuvmodul
Young's modulus
Poissons konstant
ljudhastighet
klassificering
KategoriAktinider, Actinides
CAS Group
IUPAC Group
Glawe Number37
Mendeleev Number22
Pettifor Number44
Geochemical Class
Goldschmidt classificationsynthetic
övrigt
Gas Basicity
Dipole Polarizability
151 ± 20 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
180
Neutron Mass Absorption
kvanttal6L11/2
rymdgrupp62 (Pnma)

Neptuniumisotoper

Stabila isotoper0
Instabila isotoper27
Radioactive Isotopes27

219Np

natural abundanceRadioactive ☢️
relative atomic mass
219,031601865 ± 0,000098732 Da
masstal219
g-factor
Halveringstid
570 ± 450 us
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum2015
Paritet-
219Np Decay Modes
decay modeIntensitet
α (α emission)100%

220Np

natural abundanceRadioactive ☢️
relative atomic mass
220,03271628 ± 0,000032977 Da
masstal220
g-factor
Halveringstid
29 ± 11 ns
Spinn1
nuclear quadrupole moment
upptäcktsdatum2019
Paritet-
220Np Decay Modes
decay modeIntensitet
α (α emission)100%

221Np

natural abundanceRadioactive ☢️
relative atomic mass
221,03211 ± 0,000215 Da
masstal221
g-factor
Halveringstid
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum
Paritet-
221Np Decay Modes
decay modeIntensitet
α (α emission)%

222Np

natural abundanceRadioactive ☢️
relative atomic mass
222,033574706 ± 0,000040849 Da
masstal222
g-factor
Halveringstid
480 ± 190 ns
Spinn1
nuclear quadrupole moment
upptäcktsdatum2020
Paritet-
222Np Decay Modes
decay modeIntensitet
α (α emission)100%

223Np

natural abundanceRadioactive ☢️
relative atomic mass
223,03291334 ± 0,000088956 Da
masstal223
g-factor
Halveringstid
2,5 ± 0,8 us
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum2017
Paritet-
223Np Decay Modes
decay modeIntensitet
α (α emission)100%

224Np

natural abundanceRadioactive ☢️
relative atomic mass
224,03438803 ± 0,000031052 Da
masstal224
g-factor
Halveringstid
48 ± 19 us
Spinn2
nuclear quadrupole moment
upptäcktsdatum2018
Paritet-
224Np Decay Modes
decay modeIntensitet
α (α emission)100%

225Np

natural abundanceRadioactive ☢️
relative atomic mass
225,033943422 ± 0,000098355 Da
masstal225
g-factor
Halveringstid
6,5 ± 3,5 ms
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum1994
Paritet-
225Np Decay Modes
decay modeIntensitet
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)%

226Np

natural abundanceRadioactive ☢️
relative atomic mass
226,035230364 ± 0,000109568 Da
masstal226
g-factor
Halveringstid
35 ± 10 ms
Spinn
nuclear quadrupole moment
upptäcktsdatum1990
Paritet
226Np Decay Modes
decay modeIntensitet
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)%

227Np

natural abundanceRadioactive ☢️
relative atomic mass
227,034975012 ± 0,000082651 Da
masstal227
g-factor
Halveringstid
510 ± 60 ms
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1990
Paritet+
227Np Decay Modes
decay modeIntensitet
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)%

228Np

natural abundanceRadioactive ☢️
relative atomic mass
228,036313 ± 0,000108 Da
masstal228
g-factor
Halveringstid
61,4 ± 1,4 s
Spinn4
nuclear quadrupole moment
upptäcktsdatum1994
Paritet+
228Np Decay Modes
decay modeIntensitet
ϵ (electron capture)59%
α (α emission)41%
β+ SF (β+-delayed fission)0.012%

229Np

natural abundanceRadioactive ☢️
relative atomic mass
229,036287269 ± 0,000108618 Da
masstal229
g-factor
Halveringstid
4 ± 0,18 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1968
Paritet+
229Np Decay Modes
decay modeIntensitet
α (α emission)68%
β+ (β+ decay; β+ = ϵ + e+)%

230Np

natural abundanceRadioactive ☢️
relative atomic mass
230,03782806 ± 0,000059051 Da
masstal230
g-factor
Halveringstid
4,6 ± 0,3 m
Spinn4
nuclear quadrupole moment
upptäcktsdatum1968
Paritet+
230Np Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)97%
α (α emission)3%

231Np

natural abundanceRadioactive ☢️
relative atomic mass
231,038243598 ± 0,000054916 Da
masstal231
g-factor
Halveringstid
48,8 ± 0,2 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1950
Paritet+
231Np Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)98%
α (α emission)2%

232Np

natural abundanceRadioactive ☢️
relative atomic mass
232,040107 ± 0,000107 Da
masstal232
g-factor
Halveringstid
14,7 ± 0,3 m
Spinn5
nuclear quadrupole moment
upptäcktsdatum1950
Paritet-
232Np Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)%

233Np

natural abundanceRadioactive ☢️
relative atomic mass
233,040739421 ± 0,000054729 Da
masstal233
g-factor
Halveringstid
36,2 ± 0,1 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1950
Paritet+
233Np Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.0007%

234Np

natural abundanceRadioactive ☢️
relative atomic mass
234,042893245 ± 0,000009014 Da
masstal234
g-factor
0
Halveringstid
4,4 ± 0,1 d
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1949
Paritet+
234Np Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

235Np

natural abundanceRadioactive ☢️
relative atomic mass
235,044061518 ± 0,00000149 Da
masstal235
g-factor
Halveringstid
396,1 ± 1,2 d
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1949
Paritet+
235Np Decay Modes
decay modeIntensitet
ϵ (electron capture)99.9974%
α (α emission)0.0026%

236Np

natural abundanceRadioactive ☢️
relative atomic mass
236,046568296 ± 0,000054129 Da
masstal236
g-factor
Halveringstid
153 ± 5 ky
Spinn6
nuclear quadrupole moment
upptäcktsdatum1949
Paritet-
236Np Decay Modes
decay modeIntensitet
ϵ (electron capture)86.3%
β− (β− decay)13.5%
α (α emission)0.16%

237Np

natural abundanceRadioactive ☢️
relative atomic mass
237,04817164 ± 0,000001201 Da
masstal237
g-factor
Halveringstid
2,144 ± 0,007 My
Spinn5/2
nuclear quadrupole moment
3,886 ± 0,006
upptäcktsdatum1948
Paritet+
237Np Decay Modes
decay modeIntensitet
α (α emission)100%
SF (spontaneous fission)2%
30Mg4%

238Np

natural abundanceRadioactive ☢️
relative atomic mass
238,050944603 ± 0,00000122 Da
masstal238
g-factor
Halveringstid
2,099 ± 0,002 d
Spinn2
nuclear quadrupole moment
upptäcktsdatum1949
Paritet+
238Np Decay Modes
decay modeIntensitet
β− (β− decay)100%

239Np

natural abundanceRadioactive ☢️
relative atomic mass
239,052937538 ± 0,000001406 Da
masstal239
g-factor
Halveringstid
2,356 ± 0,003 d
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1940
Paritet+
239Np Decay Modes
decay modeIntensitet
β− (β− decay)100%
α (α emission)%

240Np

natural abundanceRadioactive ☢️
relative atomic mass
240,056163778 ± 0,000018284 Da
masstal240
g-factor
Halveringstid
61,9 ± 0,2 m
Spinn5
nuclear quadrupole moment
upptäcktsdatum1953
Paritet+
240Np Decay Modes
decay modeIntensitet
β− (β− decay)100%

241Np

natural abundanceRadioactive ☢️
relative atomic mass
241,058309671 ± 0,00010736 Da
masstal241
g-factor
Halveringstid
13,9 ± 0,2 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1959
Paritet+
241Np Decay Modes
decay modeIntensitet
β− (β− decay)100%
α (α emission)%

242Np

natural abundanceRadioactive ☢️
relative atomic mass
242,061639548 ± 0,000214712 Da
masstal242
g-factor
Halveringstid
2,2 ± 0,2 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1979
Paritet+
242Np Decay Modes
decay modeIntensitet
β− (β− decay)100%

243Np

natural abundanceRadioactive ☢️
relative atomic mass
243,064204 ± 0,000034 Da
masstal243
g-factor
Halveringstid
1,85 ± 0,15 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1979
Paritet+
243Np Decay Modes
decay modeIntensitet
β− (β− decay)100%

244Np

natural abundanceRadioactive ☢️
relative atomic mass
244,067891 ± 0,000107 Da
masstal244
g-factor
Halveringstid
2,29 ± 0,16 m
Spinn7
nuclear quadrupole moment
upptäcktsdatum1987
Paritet-
244Np Decay Modes
decay modeIntensitet
β− (β− decay)100%

245Np

natural abundanceRadioactive ☢️
relative atomic mass
245,070693 ± 0,000215 Da
masstal245
g-factor
Halveringstid
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum
Paritet+
245Np Decay Modes
decay modeIntensitet
β− (β− decay)%
Neptunium2

historia

upptäckare eller uppfinnareE.M. McMillan, P.H. Abelson
fyndplatsUnited States
upptäcktsdatum1940
etymologiNamed for the planet Neptune.
uttalnep-TOO-ni-em (engelska)

Sources

Förekomst
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body
0 %
Abundance in Meteor
0 %
Abundance in Sun
0 %
Abundance in Universe
0 %

Nuclear Screening Constants

Neptunium on ChemicalAid