Neptuni

Neptuni (Np)

chemical element with the atomic number of 93 and symbol Np
Atomic Number93
Atomic Weight237
Rhif màs219
Group
Period7
Blockf
Proton93 p+
Niwtron126 n0
Electron93 e-
Animated Bohr model of Np (Neptuni)

Nodwedd Ffisegol

Atomic Radius
175 pm
molar volume
covalent radius
171 pm
Metallic Radius
ionic radius
110 pm
Crystal Radius
124 pm
Van der Waals radius
239 pm
density
20.2 g/cm³
Atomic Radii Of The Elements: Neptuni0153045607590105120135150165180195210225240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
ionization energy of Np (Neptuni)
enthalpy of vaporization
336 kJ/mol
enthalpy of fusion
9.6 kJ/mol
standard enthalpy of formation
464.8 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 32, 22, 9, 2
Bohr model: Np (Neptuni)
valence electron2
Lewis structure: Np (Neptuni)
trefn yr electronnau[Rn] 5f4 6d1 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f4 6d1 7s2
Enhanced Bohr model of Np (Neptuni)
Orbital Diagram of Np (Neptuni)
Cyflwr ocsidiad2, 3, 4, 5, 6, 7
Electronegatifedd
1.3
Electrophilicity Index
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
Melting Point
917.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearancesilvery metallic
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
0.83 MS/m
Gwrthedd
0.0000012 m Ω
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureSimple Orthorhombic (ORC)
lattice constant
4.72 Å
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number37
Mendeleev Number22
Pettifor Number44
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
151 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
180
Neutron Mass Absorption
quantum number6L11/2
space group62 (Pnma)

Isotopes of Neptunium

Stable Isotopes0
Unstable Isotopes27
Natural Isotopes0

219Np

Rhif màs219
neutron number126
relative atomic mass
219.031601865 ± 0.000098732 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
570 ± 450 us
spin9/2
nuclear quadrupole moment
dyddiad darganfod2015
parity-

decay modeintensity
α (α emission)100%

220Np

Rhif màs220
neutron number127
relative atomic mass
220.03271628 ± 0.000032977 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
29 ± 11 ns
spin1
nuclear quadrupole moment
dyddiad darganfod2019
parity-

decay modeintensity
α (α emission)100%

221Np

Rhif màs221
neutron number128
relative atomic mass
221.03211 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin9/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
α (α emission)

222Np

Rhif màs222
neutron number129
relative atomic mass
222.033574706 ± 0.000040849 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
480 ± 190 ns
spin1
nuclear quadrupole moment
dyddiad darganfod2020
parity-

decay modeintensity
α (α emission)100%

223Np

Rhif màs223
neutron number130
relative atomic mass
223.03291334 ± 0.000088956 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.5 ± 0.8 us
spin9/2
nuclear quadrupole moment
dyddiad darganfod2017
parity-

decay modeintensity
α (α emission)100%

224Np

Rhif màs224
neutron number131
relative atomic mass
224.03438803 ± 0.000031052 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
48 ± 19 us
spin2
nuclear quadrupole moment
dyddiad darganfod2018
parity-

decay modeintensity
α (α emission)100%

225Np

Rhif màs225
neutron number132
relative atomic mass
225.033943422 ± 0.000098355 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.5 ± 3.5 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1994
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

226Np

Rhif màs226
neutron number133
relative atomic mass
226.035230364 ± 0.000109568 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
35 ± 10 ms
spin
nuclear quadrupole moment
dyddiad darganfod1990
parity

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

227Np

Rhif màs227
neutron number134
relative atomic mass
227.034975012 ± 0.000082651 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
510 ± 60 ms
spin5/2
nuclear quadrupole moment
dyddiad darganfod1990
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)

228Np

Rhif màs228
neutron number135
relative atomic mass
228.036313 ± 0.000108 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
61.4 ± 1.4 s
spin4
nuclear quadrupole moment
dyddiad darganfod1994
parity+

decay modeintensity
ϵ (electron capture)59%
α (α emission)41%
β+ SF (β+-delayed fission)0.012%

229Np

Rhif màs229
neutron number136
relative atomic mass
229.036287269 ± 0.000108618 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4 ± 0.18 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1968
parity+

decay modeintensity
α (α emission)68%
β+ (β+ decay; β+ = ϵ + e+)

230Np

Rhif màs230
neutron number137
relative atomic mass
230.03782806 ± 0.000059051 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.6 ± 0.3 m
spin4
nuclear quadrupole moment
dyddiad darganfod1968
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)97%
α (α emission)3%

231Np

Rhif màs231
neutron number138
relative atomic mass
231.038243598 ± 0.000054916 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
48.8 ± 0.2 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)98%
α (α emission)2%

232Np

Rhif màs232
neutron number139
relative atomic mass
232.040107 ± 0.000107 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
14.7 ± 0.3 m
spin5
nuclear quadrupole moment
dyddiad darganfod1950
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)

233Np

Rhif màs233
neutron number140
relative atomic mass
233.040739421 ± 0.000054729 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
36.2 ± 0.1 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.0007%

234Np

Rhif màs234
neutron number141
relative atomic mass
234.042893245 ± 0.000009014 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.4 ± 0.1 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1949
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

235Np

Rhif màs235
neutron number142
relative atomic mass
235.044061518 ± 0.00000149 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
396.1 ± 1.2 d
spin5/2
nuclear quadrupole moment
dyddiad darganfod1949
parity+

decay modeintensity
ϵ (electron capture)99.9974%
α (α emission)0.0026%

236Np

Rhif màs236
neutron number143
relative atomic mass
236.046568296 ± 0.000054129 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
153 ± 5 ky
spin6
nuclear quadrupole moment
dyddiad darganfod1949
parity-

decay modeintensity
ϵ (electron capture)86.3%
β (β decay)13.5%
α (α emission)0.16%

237Np

Rhif màs237
neutron number144
relative atomic mass
237.04817164 ± 0.000001201 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.144 ± 0.007 My
spin5/2
nuclear quadrupole moment
3.886 ± 0.006
dyddiad darganfod1948
parity+

decay modeintensity
α (α emission)100%
SF (spontaneous fission)2%
30Mg4%

238Np

Rhif màs238
neutron number145
relative atomic mass
238.050944603 ± 0.00000122 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.099 ± 0.002 d
spin2
nuclear quadrupole moment
dyddiad darganfod1949
parity+

decay modeintensity
β (β decay)100%

239Np

Rhif màs239
neutron number146
relative atomic mass
239.052937538 ± 0.000001406 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.356 ± 0.003 d
spin5/2
nuclear quadrupole moment
dyddiad darganfod1940
parity+

decay modeintensity
β (β decay)100%
α (α emission)

240Np

Rhif màs240
neutron number147
relative atomic mass
240.056163778 ± 0.000018284 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
61.9 ± 0.2 m
spin5
nuclear quadrupole moment
dyddiad darganfod1953
parity+

decay modeintensity
β (β decay)100%

241Np

Rhif màs241
neutron number148
relative atomic mass
241.058309671 ± 0.00010736 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.9 ± 0.2 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1959
parity+

decay modeintensity
β (β decay)100%
α (α emission)

242Np

Rhif màs242
neutron number149
relative atomic mass
242.061639548 ± 0.000214712 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.2 ± 0.2 m
spin1
nuclear quadrupole moment
dyddiad darganfod1979
parity+

decay modeintensity
β (β decay)100%

243Np

Rhif màs243
neutron number150
relative atomic mass
243.064204 ± 0.000034 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.85 ± 0.15 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1979
parity+

decay modeintensity
β (β decay)100%

244Np

Rhif màs244
neutron number151
relative atomic mass
244.067891 ± 0.000107 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.29 ± 0.16 m
spin7
nuclear quadrupole moment
dyddiad darganfod1987
parity-

decay modeintensity
β (β decay)100%

245Np

Rhif màs245
neutron number152
relative atomic mass
245.070693 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
β (β decay)
Neptunium2

hanes

darganfyddwr neu ddyfeisiwrE.M. McMillan, P.H. Abelson
man darganfodUnited States
dyddiad darganfod1940
geirdarddiadNamed for the planet Neptune.
ynganiadnep-TOO-ni-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
natural abundance (corff dynol)
0 %
natural abundance (Awyrfaen)
0 %
natural abundance (Haul)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants