Neptunij (Np)

chemical element with the atomic number of 93 and symbol Np

Atomski broj	93
Relativna atomska masa	237
Maseni broj	219

Skupina
Perioda	7
Blok	f

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

Animated Bohrov model atoma of Np (Neptunij)

Physical Property

Atomski Radijus	175 pm 281 pm
Molni volumen	21,1 cm³/mol
Kovalentni Radijus	171 pm 136 pm 116 pm 190 pm
Metallic Radius
Ionski radijus	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
Van der Waals radius	239 pm 252 pm 342,4 pm
gustoća	20,2 g/cm³

Kemijsko Svojstvo

{ERROR}

energija

proton affinity
Elektronski afinitet
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

Toplina isparivanja	336 kJ/mol
toplina taljenja	9,6 kJ/mol
standard enthalpy of formation	464,8 kJ/mol
elektron

Elektronska ljuska	2, 8, 18, 32, 22, 9, 2

valence electron	2 ⓘ

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

Oksidacijski broj	2, 3, 4, 5, 6, 7
Elektronegativnost	0.14265 1.3
Electrophilicity Index
fundamental state of matter

agregatno stanje
gaseous state of matter
Vrelište
Talište	917,15 K
critical pressure
critical temperature
Trojna točka
appearance
boja	Crna #ffffff #0080ff #0080ff
appearance	silvery metallic
Indeks prelamanja
thermodynamic material property
Toplinska vodljivost
Toplinsko istezanje
molar heat capacity
Specifični toplinski kapacitet
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	0,83 MS/m
Električna otpornost i provodnost	0,0000012 Ω*m
Supravodljivost
Magnetizam
type
Magnetna susceptibilnost (Mass)
Magnetna susceptibilnost (Molar)
Magnetna susceptibilnost (Volume)
magnetic ordering
Curieva temperatura
Néel temperature
struktura
Kristalna struktura	{ERROR}
lattice constant	4,72 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Youngov modul elastičnosti
Poissonov omjer
brzina zvuka
classification
Kategorija	Aktinoidi, 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
Nuklearni udarni presjek	180
Neutron Mass Absorption
Kvantni brojevi	6L11/2
space group	62 (Pnma)

Isotopes of Neptunium

Stabilni izotopi	0
Nestabilni izotopi	27
Natural Isotopes	0

²¹⁹Np

Maseni broj	219
neutron number	126
Relativna Atomska Masa	219,031601865 ± 0,000098732 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	570 ± 450 us
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	2015
Parnost	-

decay mode	intensity
α (α emission)	100%

²²⁰Np

Maseni broj	220
neutron number	127
Relativna Atomska Masa	220,03271628 ± 0,000032977 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	29 ± 11 ns
spin	1
nuclear quadrupole moment
vrijeme otkrića ili izuma	2019
Parnost	-

decay mode	intensity
α (α emission)	100%

²²¹Np

Maseni broj	221
neutron number	128
Relativna Atomska Masa	221,03211 ± 0,000215 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost	-

decay mode	intensity
α (α emission)

²²²Np

Maseni broj	222
neutron number	129
Relativna Atomska Masa	222,033574706 ± 0,000040849 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	480 ± 190 ns
spin	1
nuclear quadrupole moment
vrijeme otkrića ili izuma	2020
Parnost	-

decay mode	intensity
α (α emission)	100%

²²³Np

Maseni broj	223
neutron number	130
Relativna Atomska Masa	223,03291334 ± 0,000088956 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,5 ± 0,8 us
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	2017
Parnost	-

decay mode	intensity
α (α emission)	100%

²²⁴Np

Maseni broj	224
neutron number	131
Relativna Atomska Masa	224,03438803 ± 0,000031052 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	48 ± 19 us
spin	2
nuclear quadrupole moment
vrijeme otkrića ili izuma	2018
Parnost	-

decay mode	intensity
α (α emission)	100%

²²⁵Np

Maseni broj	225
neutron number	132
Relativna Atomska Masa	225,033943422 ± 0,000098355 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	6,5 ± 3,5 ms
spin	9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1994
Parnost	-

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

²²⁶Np

Maseni broj	226
neutron number	133
Relativna Atomska Masa	226,035230364 ± 0,000109568 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	35 ± 10 ms
spin
nuclear quadrupole moment
vrijeme otkrića ili izuma	1990
Parnost

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

²²⁷Np

Maseni broj	227
neutron number	134
Relativna Atomska Masa	227,034975012 ± 0,000082651 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	510 ± 60 ms
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1990
Parnost	+

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

²²⁸Np

Maseni broj	228
neutron number	135
Relativna Atomska Masa	228,036313 ± 0,000108 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	61,4 ± 1,4 s
spin	4
nuclear quadrupole moment
vrijeme otkrića ili izuma	1994
Parnost	+

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

²²⁹Np

Maseni broj	229
neutron number	136
Relativna Atomska Masa	229,036287269 ± 0,000108618 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4 ± 0,18 m
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1968
Parnost	+

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

²³⁰Np

Maseni broj	230
neutron number	137
Relativna Atomska Masa	230,03782806 ± 0,000059051 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4,6 ± 0,3 m
spin	4
nuclear quadrupole moment
vrijeme otkrića ili izuma	1968
Parnost	+

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

²³¹Np

Maseni broj	231
neutron number	138
Relativna Atomska Masa	231,038243598 ± 0,000054916 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	48,8 ± 0,2 m
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1950
Parnost	+

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

²³²Np

Maseni broj	232
neutron number	139
Relativna Atomska Masa	232,040107 ± 0,000107 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	14,7 ± 0,3 m
spin	5
nuclear quadrupole moment
vrijeme otkrića ili izuma	1950
Parnost	-

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

²³³Np

Maseni broj	233
neutron number	140
Relativna Atomska Masa	233,040739421 ± 0,000054729 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	36,2 ± 0,1 m
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1950
Parnost	+

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

²³⁴Np

Maseni broj	234
neutron number	141
Relativna Atomska Masa	234,042893245 ± 0,000009014 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4,4 ± 0,1 d
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1949
Parnost	+

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

²³⁵Np

Maseni broj	235
neutron number	142
Relativna Atomska Masa	235,044061518 ± 0,00000149 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	396,1 ± 1,2 d
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1949
Parnost	+

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

²³⁶Np

Maseni broj	236
neutron number	143
Relativna Atomska Masa	236,046568296 ± 0,000054129 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	153 ± 5 ky
spin	6
nuclear quadrupole moment
vrijeme otkrića ili izuma	1949
Parnost	-

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

²³⁷Np

Maseni broj	237
neutron number	144
Relativna Atomska Masa	237,04817164 ± 0,000001201 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,144 ± 0,007 My
spin	5/2
nuclear quadrupole moment	3,886 ± 0,006
vrijeme otkrića ili izuma	1948
Parnost	+

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

²³⁸Np

Maseni broj	238
neutron number	145
Relativna Atomska Masa	238,050944603 ± 0,00000122 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,099 ± 0,002 d
spin	2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1949
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²³⁹Np

Maseni broj	239
neutron number	146
Relativna Atomska Masa	239,052937538 ± 0,000001406 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,356 ± 0,003 d
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1940
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
α (α emission)

²⁴⁰Np

Maseni broj	240
neutron number	147
Relativna Atomska Masa	240,056163778 ± 0,000018284 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	61,9 ± 0,2 m
spin	5
nuclear quadrupole moment
vrijeme otkrića ili izuma	1953
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴¹Np

Maseni broj	241
neutron number	148
Relativna Atomska Masa	241,058309671 ± 0,00010736 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	13,9 ± 0,2 m
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1959
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
α (α emission)

²⁴²Np

Maseni broj	242
neutron number	149
Relativna Atomska Masa	242,061639548 ± 0,000214712 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,2 ± 0,2 m
spin	1
nuclear quadrupole moment
vrijeme otkrića ili izuma	1979
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴³Np

Maseni broj	243
neutron number	150
Relativna Atomska Masa	243,064204 ± 0,000034 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,85 ± 0,15 m
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1979
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴⁴Np

Maseni broj	244
neutron number	151
Relativna Atomska Masa	244,067891 ± 0,000107 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,29 ± 0,16 m
spin	7
nuclear quadrupole moment
vrijeme otkrića ili izuma	1987
Parnost	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴⁵Np

Maseni broj	245
neutron number	152
Relativna Atomska Masa	245,070693 ± 0,000215 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)

povijest

otkrio/izumio	E.M. McMillan, P.H. Abelson
location of discovery	United States
vrijeme otkrića ili izuma	1940
Etimologija	Named for the planet Neptune.
pronunciation	nep-TOO-ni-em (engleski)

source

Obilnost
Zastupljenost u Zemljinoj kori
natural abundance (ocean)
natural abundance (tijelo)	0 %
natural abundance (meteoroid)	0 %
natural abundance (Sunce)	0 %
Zastupljenost u svemiru	0 %

Nuclear Screening Constants

Neptunij on ChemicalAid

Neptunij (Np)

Physical Property

Kemijsko Svojstvo

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

povijest

source

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