Neptunium (Np)

chemical element with the atomic number of 93 and symbol Np

Atomic Number	93
Atomic Weight	237
Nombor jisim	219

Group
Period	7
Block	f

proton	93 p⁺
neutron	126 n⁰
Elektron	93 e^-

Sifat Fizikal

Jejari Atom	175 pm 281 pm
molar volume	21.1 cm³/mol
Jejari kovalen	171 pm 136 pm 116 pm 190 pm
Metallic Radius
ionic radius	110 pm 101 pm 87 pm 98 pm 75 pm 72 pm 71 pm 117.8 pm
Crystal Radius	124 pm 115 pm 101 pm 112 pm 89 pm 86 pm 85 pm 131.8 pm
Jejari van der Waals	239 pm 252 pm 342.4 pm
ketumpatan	20.2 g/cm³

Sifat Kimia

{ERROR}

tenaga

proton affinity
Pertalian elektron
ionization energy	6.2655 eV/particle 11.5 eV/particle 19.7 eV/particle 33.8 eV/particle 48 eV/particle 65 eV/particle 92 eV/particle 107 eV/particle 121 eV/particle 136 eV/particle 151 eV/particle 179 eV/particle 196 eV/particle 233 eV/particle 252 eV/particle 355 eV/particle 382 eV/particle 408 eV/particle 438 eV/particle 466 eV/particle 495 eV/particle 535 eV/particle 565 eV/particle 596 eV/particle 626 eV/particle 770 eV/particle 810 eV/particle 850 eV/particle 880 eV/particle 980 eV/particle 1,020 eV/particle 1,130 eV/particle 1,170 eV/particle 1,280 eV/particle 1,360 eV/particle 1,430 eV/particle 1,510 eV/particle 1,590 eV/particle 1,670 eV/particle 1,740 eV/particle 1,820 eV/particle 1,910 eV/particle 1,990 eV/particle 2,070 eV/particle 2,140 eV/particle 2,200 eV/particle 2,310 eV/particle 2,675 eV/particle 2,745 eV/particle 2,817 eV/particle 2,894 eV/particle 2,969 eV/particle 3,041 eV/particle 3,181 eV/particle 3,255 eV/particle 3,338 eV/particle 3,413 eV/particle 3,718 eV/particle 3,792 eV/particle 3,872 eV/particle 3,947 eV/particle 4,353 eV/particle 4,441 eV/particle 4,658 eV/particle 4,744 eV/particle 7,610 eV/particle 7,770 eV/particle 7,950 eV/particle 8,130 eV/particle 8,310 eV/particle 8,480 eV/particle 8,890 eV/particle 9,070 eV/particle 9,270 eV/particle 9,450 eV/particle 9,970 eV/particle 10,130 eV/particle 10,300 eV/particle 10,460 eV/particle 11,740 eV/particle 11,930 eV/particle 12,320 eV/particle 12,500 eV/particle 25,870 eV/particle 26,300 eV/particle 26,770 eV/particle 27,210 eV/particle 31,910 eV/particle 32,500 eV/particle 33,300 eV/particle 33,722.2 eV/particle 132,901.8 eV/particle 135,202 eV/particle

Entalpi pengewapan	336 kJ/mol
entalpi pelakuran	9.6 kJ/mol
standard enthalpy of formation	464.8 kJ/mol
Elektron

Petala elektron	2, 8, 18, 32, 22, 9, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Rn] 5f⁴ 6d¹ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f⁴ 6d¹ 7s²

Keadaan pengoksidaan	2, 3, 4, 5, 6, 7
Keelektronegatifan	0.14265 1.3
Electrophilicity Index
keadaan jirim asas

fasa jirim
gaseous state of matter
Boiling Point
Melting Point	917.15 K
critical pressure
critical temperature
triple point
rupa
warna	Black #ffffff #0080ff #0080ff
rupa	silvery metallic
indeks biasan
sifat bahan
Thermal Conductivity
Pengembangan terma
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type	Conductor
Kekonduksian elektrik	0.83 MS/m
Kerintangan dan kekonduksian elektrik	0.0000012 Ω*m
Kesuperkonduksian
kemagnetan
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	{ERROR}
lattice constant	4.72 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi
pengelasan
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	37
Mendeleev Number	22
Pettifor Number	44
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	151 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	180
Neutron Mass Absorption
Nombor kuantum	6L11/2
space group	62 (Pnma)

Isotopes of Neptunium

Stable Isotopes	0
Unstable Isotopes	27
Natural Isotopes	0

²¹⁹Np

Nombor jisim	219
nombor neutron	126
Jisim Atom Relatif	219.031601865 ± 0.000098732 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	570 ± 450 us
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2015
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²⁰Np

Nombor jisim	220
nombor neutron	127
Jisim Atom Relatif	220.03271628 ± 0.000032977 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	29 ± 11 ns
Spin	1
nuclear quadrupole moment
tarikh penemuan	2019
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²¹Np

Nombor jisim	221
nombor neutron	128
Jisim Atom Relatif	221.03211 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	9/2
nuclear quadrupole moment
tarikh penemuan
parity	-

decay mode	Keamatan (fizik)
α (α emission)

²²²Np

Nombor jisim	222
nombor neutron	129
Jisim Atom Relatif	222.033574706 ± 0.000040849 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	480 ± 190 ns
Spin	1
nuclear quadrupole moment
tarikh penemuan	2020
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²³Np

Nombor jisim	223
nombor neutron	130
Jisim Atom Relatif	223.03291334 ± 0.000088956 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.5 ± 0.8 us
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2017
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²⁴Np

Nombor jisim	224
nombor neutron	131
Jisim Atom Relatif	224.03438803 ± 0.000031052 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	48 ± 19 us
Spin	2
nuclear quadrupole moment
tarikh penemuan	2018
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²⁵Np

Nombor jisim	225
nombor neutron	132
Jisim Atom Relatif	225.033943422 ± 0.000098355 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	6.5 ± 3.5 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1994
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²²⁶Np

Nombor jisim	226
nombor neutron	133
Jisim Atom Relatif	226.035230364 ± 0.000109568 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	35 ± 10 ms
Spin
nuclear quadrupole moment
tarikh penemuan	1990
parity

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²²⁷Np

Nombor jisim	227
nombor neutron	134
Jisim Atom Relatif	227.034975012 ± 0.000082651 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	510 ± 60 ms
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1990
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²²⁸Np

Nombor jisim	228
nombor neutron	135
Jisim Atom Relatif	228.036313 ± 0.000108 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	61.4 ± 1.4 s
Spin	4
nuclear quadrupole moment
tarikh penemuan	1994
parity	+

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

²²⁹Np

Nombor jisim	229
nombor neutron	136
Jisim Atom Relatif	229.036287269 ± 0.000108618 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	4 ± 0.18 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	+

decay mode	Keamatan (fizik)
α (α emission)	68%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²³⁰Np

Nombor jisim	230
nombor neutron	137
Jisim Atom Relatif	230.03782806 ± 0.000059051 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	4.6 ± 0.3 m
Spin	4
nuclear quadrupole moment
tarikh penemuan	1968
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	97%
α (α emission)	3%

²³¹Np

Nombor jisim	231
nombor neutron	138
Jisim Atom Relatif	231.038243598 ± 0.000054916 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	48.8 ± 0.2 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1950
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98%
α (α emission)	2%

²³²Np

Nombor jisim	232
nombor neutron	139
Jisim Atom Relatif	232.040107 ± 0.000107 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	14.7 ± 0.3 m
Spin	5
nuclear quadrupole moment
tarikh penemuan	1950
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

²³³Np

Nombor jisim	233
nombor neutron	140
Jisim Atom Relatif	233.040739421 ± 0.000054729 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	36.2 ± 0.1 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1950
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.0007%

²³⁴Np

Nombor jisim	234
nombor neutron	141
Jisim Atom Relatif	234.042893245 ± 0.000009014 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	4.4 ± 0.1 d
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1949
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

²³⁵Np

Nombor jisim	235
nombor neutron	142
Jisim Atom Relatif	235.044061518 ± 0.00000149 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	396.1 ± 1.2 d
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1949
parity	+

decay mode	Keamatan (fizik)
ϵ (electron capture)	99.9974%
α (α emission)	0.0026%

²³⁶Np

Nombor jisim	236
nombor neutron	143
Jisim Atom Relatif	236.046568296 ± 0.000054129 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	153 ± 5 ky
Spin	6
nuclear quadrupole moment
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
ϵ (electron capture)	86.3%
β⁻ (β⁻ decay)	13.5%
α (α emission)	0.16%

²³⁷Np

Nombor jisim	237
nombor neutron	144
Jisim Atom Relatif	237.04817164 ± 0.000001201 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.144 ± 0.007 My
Spin	5/2
nuclear quadrupole moment	3.886 ± 0.006
tarikh penemuan	1948
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	2%
30Mg	4%

²³⁸Np

Nombor jisim	238
nombor neutron	145
Jisim Atom Relatif	238.050944603 ± 0.00000122 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.099 ± 0.002 d
Spin	2
nuclear quadrupole moment
tarikh penemuan	1949
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²³⁹Np

Nombor jisim	239
nombor neutron	146
Jisim Atom Relatif	239.052937538 ± 0.000001406 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.356 ± 0.003 d
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1940
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
α (α emission)

²⁴⁰Np

Nombor jisim	240
nombor neutron	147
Jisim Atom Relatif	240.056163778 ± 0.000018284 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	61.9 ± 0.2 m
Spin	5
nuclear quadrupole moment
tarikh penemuan	1953
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴¹Np

Nombor jisim	241
nombor neutron	148
Jisim Atom Relatif	241.058309671 ± 0.00010736 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	13.9 ± 0.2 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1959
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
α (α emission)

²⁴²Np

Nombor jisim	242
nombor neutron	149
Jisim Atom Relatif	242.061639548 ± 0.000214712 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.2 ± 0.2 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1979
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴³Np

Nombor jisim	243
nombor neutron	150
Jisim Atom Relatif	243.064204 ± 0.000034 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.85 ± 0.15 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1979
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁴Np

Nombor jisim	244
nombor neutron	151
Jisim Atom Relatif	244.067891 ± 0.000107 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.29 ± 0.16 m
Spin	7
nuclear quadrupole moment
tarikh penemuan	1987
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁵Np

Nombor jisim	245
nombor neutron	152
Jisim Atom Relatif	245.070693 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	5/2
nuclear quadrupole moment
tarikh penemuan
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)

sejarah

penemu atau pereka	E.M. McMillan, P.H. Abelson
tempat penemuan	United States
tarikh penemuan	1940
Etimologi	Named for the planet Neptune.
sebutan	nep-TOO-ni-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust
natural abundance (lautan)
natural abundance (Tubuh manusia)	0 %
natural abundance (Meteoroid)	0 %
natural abundance (Matahari)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Neptunium on ChemicalAid

Neptunium (Np)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Neptunium

219Np

220Np

221Np

222Np

223Np

224Np

225Np

226Np

227Np

228Np

229Np

230Np

231Np

232Np

233Np

234Np

235Np

236Np

237Np

238Np

239Np

240Np

241Np

242Np

243Np

244Np

245Np

sejarah

sumber

Nuclear Screening Constants

²¹⁹Np

²²⁰Np

²²¹Np

²²²Np

²²³Np

²²⁴Np

²²⁵Np

²²⁶Np

²²⁷Np

²²⁸Np

²²⁹Np

²³⁰Np

²³¹Np

²³²Np

²³³Np

²³⁴Np

²³⁵Np

²³⁶Np

²³⁷Np

²³⁸Np

²³⁹Np

²⁴⁰Np

²⁴¹Np

²⁴²Np

²⁴³Np

²⁴⁴Np

²⁴⁵Np