Neptunij[um] (Np)

hemijski element sa simbolom Np i atomskim brojem 93

Atomic Number	93
Atomic Weight	237
Maseni broj	219

Group
Period	7
Block	f

Proton	93 p⁺
Neutron	126 n⁰
Elektron	93 e^-

Animated Bohrov model atoma of Np (Neptunij[um])

Physical Property

Atomski Radijus	175 pm 281 pm
Molarni volumen	21,1 cm³/mol
covalent radius	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 Waalsov radijus	239 pm 252 pm 342,4 pm
gustoća	20,2 g/cm³

Chemical Property

{ERROR}

energija

proton affinity
electron affinity
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

Toplota isparavanja	336 kJ/mol
toplota topljenja	9,6 kJ/mol
standard enthalpy of formation	464,8 kJ/mol
Elektron

electron shell	2, 8, 18, 32, 22, 9, 2

Valentni elektron	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

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

agregatno stanje
gaseous state of matter
Boiling Point
Melting Point	917,15 K
critical pressure
Kritična temperatura
Trojna tačka
appearance
boja	Black #ffffff #0080ff #0080ff
appearance	silvery metallic
Indeks prelamanja
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type	Conductor
Specifična električna provodljivost	0,83 MS/m
electrical resistivity	0,0000012 Ω*m
Superprovodljivost
Magnetizam
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal Structure	{ERROR}
lattice constant	4,72 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Brzina zvuka
klasifikacija
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
Kvantni brojevi	6L11/2
space group	62 (Pnma)

Isotopes of Neptunium

Stable Isotopes	0
Unstable Isotopes	27
Natural Isotopes	0

²¹⁹Np

Maseni broj	219
broj neutrona	126
Relative Atomic Mass	219,031601865 ± 0,000098732 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	570 ± 450 us
spin	9/2
nuclear quadrupole moment
datum otkrića	2015
parity	-

decay mode	intensity
α (α emission)	100%

²²⁰Np

Maseni broj	220
broj neutrona	127
Relative Atomic Mass	220,03271628 ± 0,000032977 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	29 ± 11 ns
spin	1
nuclear quadrupole moment
datum otkrića	2019
parity	-

decay mode	intensity
α (α emission)	100%

²²¹Np

Maseni broj	221
broj neutrona	128
Relative Atomic Mass	221,03211 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	9/2
nuclear quadrupole moment
datum otkrića
parity	-

decay mode	intensity
α (α emission)

²²²Np

Maseni broj	222
broj neutrona	129
Relative Atomic Mass	222,033574706 ± 0,000040849 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	480 ± 190 ns
spin	1
nuclear quadrupole moment
datum otkrića	2020
parity	-

decay mode	intensity
α (α emission)	100%

²²³Np

Maseni broj	223
broj neutrona	130
Relative Atomic Mass	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
datum otkrića	2017
parity	-

decay mode	intensity
α (α emission)	100%

²²⁴Np

Maseni broj	224
broj neutrona	131
Relative Atomic Mass	224,03438803 ± 0,000031052 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	48 ± 19 us
spin	2
nuclear quadrupole moment
datum otkrića	2018
parity	-

decay mode	intensity
α (α emission)	100%

²²⁵Np

Maseni broj	225
broj neutrona	132
Relative Atomic Mass	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
datum otkrića	1994
parity	-

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

²²⁶Np

Maseni broj	226
broj neutrona	133
Relative Atomic Mass	226,035230364 ± 0,000109568 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	35 ± 10 ms
spin
nuclear quadrupole moment
datum otkrića	1990
parity

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

²²⁷Np

Maseni broj	227
broj neutrona	134
Relative Atomic Mass	227,034975012 ± 0,000082651 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	510 ± 60 ms
spin	5/2
nuclear quadrupole moment
datum otkrića	1990
parity	+

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

²²⁸Np

Maseni broj	228
broj neutrona	135
Relative Atomic Mass	228,036313 ± 0,000108 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	61,4 ± 1,4 s
spin	4
nuclear quadrupole moment
datum otkrića	1994
parity	+

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

²²⁹Np

Maseni broj	229
broj neutrona	136
Relative Atomic Mass	229,036287269 ± 0,000108618 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4 ± 0,18 m
spin	5/2
nuclear quadrupole moment
datum otkrića	1968
parity	+

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

²³⁰Np

Maseni broj	230
broj neutrona	137
Relative Atomic Mass	230,03782806 ± 0,000059051 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	4,6 ± 0,3 m
spin	4
nuclear quadrupole moment
datum otkrića	1968
parity	+

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

²³¹Np

Maseni broj	231
broj neutrona	138
Relative Atomic Mass	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
datum otkrića	1950
parity	+

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

²³²Np

Maseni broj	232
broj neutrona	139
Relative Atomic Mass	232,040107 ± 0,000107 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	14,7 ± 0,3 m
spin	5
nuclear quadrupole moment
datum otkrića	1950
parity	-

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

²³³Np

Maseni broj	233
broj neutrona	140
Relative Atomic Mass	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
datum otkrića	1950
parity	+

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

²³⁴Np

Maseni broj	234
broj neutrona	141
Relative Atomic Mass	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
datum otkrića	1949
parity	+

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

²³⁵Np

Maseni broj	235
broj neutrona	142
Relative Atomic Mass	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
datum otkrića	1949
parity	+

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

²³⁶Np

Maseni broj	236
broj neutrona	143
Relative Atomic Mass	236,046568296 ± 0,000054129 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	153 ± 5 ky
spin	6
nuclear quadrupole moment
datum otkrića	1949
parity	-

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

²³⁷Np

Maseni broj	237
broj neutrona	144
Relative Atomic Mass	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
datum otkrića	1948
parity	+

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

²³⁸Np

Maseni broj	238
broj neutrona	145
Relative Atomic Mass	238,050944603 ± 0,00000122 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,099 ± 0,002 d
spin	2
nuclear quadrupole moment
datum otkrića	1949
parity	+

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

²³⁹Np

Maseni broj	239
broj neutrona	146
Relative Atomic Mass	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
datum otkrića	1940
parity	+

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

²⁴⁰Np

Maseni broj	240
broj neutrona	147
Relative Atomic Mass	240,056163778 ± 0,000018284 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	61,9 ± 0,2 m
spin	5
nuclear quadrupole moment
datum otkrića	1953
parity	+

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

²⁴¹Np

Maseni broj	241
broj neutrona	148
Relative Atomic Mass	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
datum otkrića	1959
parity	+

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

²⁴²Np

Maseni broj	242
broj neutrona	149
Relative Atomic Mass	242,061639548 ± 0,000214712 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,2 ± 0,2 m
spin	1
nuclear quadrupole moment
datum otkrića	1979
parity	+

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

²⁴³Np

Maseni broj	243
broj neutrona	150
Relative Atomic Mass	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
datum otkrića	1979
parity	+

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

²⁴⁴Np

Maseni broj	244
broj neutrona	151
Relative Atomic Mass	244,067891 ± 0,000107 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,29 ± 0,16 m
spin	7
nuclear quadrupole moment
datum otkrića	1987
parity	-

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

²⁴⁵Np

Maseni broj	245
broj neutrona	152
Relative Atomic Mass	245,070693 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	5/2
nuclear quadrupole moment
datum otkrića
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

historija

otkrivač ili izumitelj	E.M. McMillan, P.H. Abelson
mjesto otkrića	United States
datum otkrića	1940
Etimologija	Named for the planet Neptune.
pronunciation	nep-TOO-ni-em (engleski)

izvor

Abundance
Abundance in Earth's crust
natural abundance (okean)
natural abundance (ljudsko tijelo)	0 %
natural abundance (Meteoroidi)	0 %
natural abundance (Sunce)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Neptunij[um] on ChemicalAid

Neptunij[um] (Np)

Physical Property

Chemical Property

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

historija

izvor

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