Neptunjum, ²Nettunju

Neptunjum, ²Nettunju (Np)

chemical element with the atomic number of 93 and symbol Np
Atomic Number93
Atomic Weight237
mass number219
Group
Period7
Blockf
proton93 p+
neutron126 n0
elettron93 e-
Animated Bohr model of Np (Neptunjum, ²Nettunju)

Physical Property

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
densità
20.2 g/cm³
Atomic Radii Of The Elements: Neptunjum, ²Nettunju0102030405060708090100110120130140150160170180190200210220230240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

enerġija
proton affinity
electron affinity
ionization energy
ionization energy of Np (Neptunjum, ²Nettunju)
enthalpy of vaporization
336 kJ/mol
enthalpy of fusion
9.6 kJ/mol
standard enthalpy of formation
464.8 kJ/mol
elettron
electron shell2, 8, 18, 32, 22, 9, 2
Bohr model: Np (Neptunjum, ²Nettunju)
valence electron2
Lewis structure: Np (Neptunjum, ²Nettunju)
electron configuration[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 (Neptunjum, ²Nettunju)
Orbital Diagram of Np (Neptunjum, ²Nettunju)
oxidation number2, 3, 4, 5, 6, 7
electronegativity
1.3
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
917.15 K
critical pressure
critical temperature
triple point
appearance
kulur
Silver
appearancesilvery metallic
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
0.83 MS/m
electrical resistivity
0.0000012 m Ω
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal StructureSimple Orthorhombic (ORC)
lattice constant
4.72 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
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

mass number219
neutron number126
relative atomic mass
219.031601865 ± 0.000098732 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
570 ± 450 us
spin9/2
nuclear quadrupole moment
time of discovery or invention2015
parity-

decay modeintensity
α (α emission)100%

220Np

mass number220
neutron number127
relative atomic mass
220.03271628 ± 0.000032977 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
29 ± 11 ns
spin1
nuclear quadrupole moment
time of discovery or invention2019
parity-

decay modeintensity
α (α emission)100%

221Np

mass number221
neutron number128
relative atomic mass
221.03211 ± 0.000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin9/2
nuclear quadrupole moment
time of discovery or invention
parity-

decay modeintensity
α (α emission)

222Np

mass number222
neutron number129
relative atomic mass
222.033574706 ± 0.000040849 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
480 ± 190 ns
spin1
nuclear quadrupole moment
time of discovery or invention2020
parity-

decay modeintensity
α (α emission)100%

223Np

mass number223
neutron number130
relative atomic mass
223.03291334 ± 0.000088956 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.5 ± 0.8 us
spin9/2
nuclear quadrupole moment
time of discovery or invention2017
parity-

decay modeintensity
α (α emission)100%

224Np

mass number224
neutron number131
relative atomic mass
224.03438803 ± 0.000031052 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
48 ± 19 us
spin2
nuclear quadrupole moment
time of discovery or invention2018
parity-

decay modeintensity
α (α emission)100%

225Np

mass number225
neutron number132
relative atomic mass
225.033943422 ± 0.000098355 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
6.5 ± 3.5 ms
spin9/2
nuclear quadrupole moment
time of discovery or invention1994
parity-

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

226Np

mass number226
neutron number133
relative atomic mass
226.035230364 ± 0.000109568 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
35 ± 10 ms
spin
nuclear quadrupole moment
time of discovery or invention1990
parity

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

227Np

mass number227
neutron number134
relative atomic mass
227.034975012 ± 0.000082651 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
510 ± 60 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention1990
parity+

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

228Np

mass number228
neutron number135
relative atomic mass
228.036313 ± 0.000108 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
61.4 ± 1.4 s
spin4
nuclear quadrupole moment
time of discovery or invention1994
parity+

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

229Np

mass number229
neutron number136
relative atomic mass
229.036287269 ± 0.000108618 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4 ± 0.18 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1968
parity+

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

230Np

mass number230
neutron number137
relative atomic mass
230.03782806 ± 0.000059051 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4.6 ± 0.3 m
spin4
nuclear quadrupole moment
time of discovery or invention1968
parity+

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

231Np

mass number231
neutron number138
relative atomic mass
231.038243598 ± 0.000054916 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
48.8 ± 0.2 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1950
parity+

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

232Np

mass number232
neutron number139
relative atomic mass
232.040107 ± 0.000107 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
14.7 ± 0.3 m
spin5
nuclear quadrupole moment
time of discovery or invention1950
parity-

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

233Np

mass number233
neutron number140
relative atomic mass
233.040739421 ± 0.000054729 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
36.2 ± 0.1 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1950
parity+

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

234Np

mass number234
neutron number141
relative atomic mass
234.042893245 ± 0.000009014 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
4.4 ± 0.1 d
spin0
nuclear quadrupole moment
0
time of discovery or invention1949
parity+

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

235Np

mass number235
neutron number142
relative atomic mass
235.044061518 ± 0.00000149 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
396.1 ± 1.2 d
spin5/2
nuclear quadrupole moment
time of discovery or invention1949
parity+

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

236Np

mass number236
neutron number143
relative atomic mass
236.046568296 ± 0.000054129 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
153 ± 5 ky
spin6
nuclear quadrupole moment
time of discovery or invention1949
parity-

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

237Np

mass number237
neutron number144
relative atomic mass
237.04817164 ± 0.000001201 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.144 ± 0.007 My
spin5/2
nuclear quadrupole moment
3.886 ± 0.006
time of discovery or invention1948
parity+

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

238Np

mass number238
neutron number145
relative atomic mass
238.050944603 ± 0.00000122 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.099 ± 0.002 d
spin2
nuclear quadrupole moment
time of discovery or invention1949
parity+

decay modeintensity
β (β decay)100%

239Np

mass number239
neutron number146
relative atomic mass
239.052937538 ± 0.000001406 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.356 ± 0.003 d
spin5/2
nuclear quadrupole moment
time of discovery or invention1940
parity+

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

240Np

mass number240
neutron number147
relative atomic mass
240.056163778 ± 0.000018284 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
61.9 ± 0.2 m
spin5
nuclear quadrupole moment
time of discovery or invention1953
parity+

decay modeintensity
β (β decay)100%

241Np

mass number241
neutron number148
relative atomic mass
241.058309671 ± 0.00010736 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
13.9 ± 0.2 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1959
parity+

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

242Np

mass number242
neutron number149
relative atomic mass
242.061639548 ± 0.000214712 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.2 ± 0.2 m
spin1
nuclear quadrupole moment
time of discovery or invention1979
parity+

decay modeintensity
β (β decay)100%

243Np

mass number243
neutron number150
relative atomic mass
243.064204 ± 0.000034 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.85 ± 0.15 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1979
parity+

decay modeintensity
β (β decay)100%

244Np

mass number244
neutron number151
relative atomic mass
244.067891 ± 0.000107 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.29 ± 0.16 m
spin7
nuclear quadrupole moment
time of discovery or invention1987
parity-

decay modeintensity
β (β decay)100%

245Np

mass number245
neutron number152
relative atomic mass
245.070693 ± 0.000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention
parity+

decay modeintensity
β (β decay)
Neptunium2

storja

discoverer or inventorE.M. McMillan, P.H. Abelson
location of discoveryUnited States
time of discovery or invention1940
etimoloġijaNamed for the planet Neptune.
pronunciationnep-TOO-ni-em (Ingliż)

source

Abundance
Abundance in Earth's crust
natural abundance (ocean)
natural abundance (human body)
0 %
natural abundance (meteoroid)
0 %
natural abundance (Xemx)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants