Protactinijum, ²Protaktinij

Protactinijum, ²Protaktinij (Pa)

hemijski element sa simbolom Pa i atomskim brojem 91
Atomic Number91
Atomic Weight231.03588
Maseni broj231
Group
Period7
Blockf
Proton91 p+
Neutron140 n0
Elektron91 e-
Animated Bohrov model atoma of Pa (Protactinijum, ²Protaktinij)

Physical Property

Atomski Radijus
180 pm
Molarni volumen
covalent radius
169 pm
Metallic Radius
Ionski radijus
104 pm
Crystal Radius
118 pm
Van der Waalsov radijus
243 pm
gustoća
15,4 g/cm³
Atomic Radii Of The Elements: Protactinijum, ²Protaktinij0102030405060708090100110120130140150160170180190200210220230240250pmAtomski RadijusCovalent RadiusMetallic RadiusVan der Waalsov radijus

Chemical Property

energija
proton affinity
electron affinity
ionization energy
ionization energy of Pa (Protactinijum, ²Protaktinij)
Toplota isparavanja
481,2 kJ/mol
toplota topljenja
16,7 kJ/mol
standard enthalpy of formation
563 kJ/mol
Elektron
electron shell2, 8, 18, 32, 20, 9, 2
Bohrov model atoma: Pa (Protactinijum, ²Protaktinij)
Valentni elektron2
Lewis structure: Pa (Protactinijum, ²Protaktinij)
electron configuration[Rn] 5f2 6d1 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f2 6d1 7s2
Enhanced Bohrov model atoma of Pa (Protactinijum, ²Protaktinij)
Orbital Diagram of Pa (Protactinijum, ²Protaktinij)
oksidacijsko stanje2, 3, 4, 5
Elektronegativnost
1.5
Electrophilicity Index
fundamental state of matter
agregatno stanjeSolid
gaseous state of matter
Boiling Point
Melting Point
1.845,15 K
critical pressure
Kritična temperatura
Trojna tačka
appearance
boja
Silver
appearancebright, silvery metallic luster
Indeks prelamanja
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
Specifična električna provodljivost
5,6 MS/m
electrical resistivity
0,00000018 m Ω
Superprovodljivost
1,41 K
Magnetizam
typeparamagnetic
magnetic susceptibility (Mass)
0,0000000325 m³/Kg
magnetic susceptibility (Molar)
0,000000007509 m³/mol
magnetic susceptibility (Volume)
0,0004995
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal StructureCentered Tetragonal (TET)
lattice constant
3,92 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Brzina zvuka
klasifikacija
CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number35
Mendeleev Number18
Pettifor Number46
Geochemical ClassU/Th decay series
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
154 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
200
Neutron Mass Absorption
Kvantni brojevi4K11/2
space group139 (I4/mmm)

Isotopes of Protactinium

Stable Isotopes0
Unstable Isotopes31
Natural Isotopes1

211Pa

Maseni broj211
broj neutrona120
relative atomic mass
211,023674036 ± 0,000074581 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
6 ± 3 ms
spin9/2
nuclear quadrupole moment
datum otkrića2006
parity-

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

212Pa

Maseni broj212
broj neutrona121
relative atomic mass
212,023184819 ± 0,000094047 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
5,8 ± 1,9 ms
spin3
nuclear quadrupole moment
datum otkrića1997
parity+

decay modeintensity
α (α emission)100%

213Pa

Maseni broj213
broj neutrona122
relative atomic mass
213,021099644 ± 0,000061374 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
7,4 ± 2,4 ms
spin9/2
nuclear quadrupole moment
datum otkrića1995
parity-

decay modeintensity
α (α emission)100%

214Pa

Maseni broj214
broj neutrona123
relative atomic mass
214,020891055 ± 0,00008718 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
17 ± 3 ms
spin7
nuclear quadrupole moment
datum otkrića1995
parity+

decay modeintensity
α (α emission)100%

215Pa

Maseni broj215
broj neutrona124
relative atomic mass
215,019113955 ± 0,000088513 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
14 ± 2 ms
spin9/2
nuclear quadrupole moment
datum otkrića1979
parity-

decay modeintensity
α (α emission)100%

216Pa

Maseni broj216
broj neutrona125
relative atomic mass
216,019134633 ± 0,000026459 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
105 ± 12 ms
spin5
nuclear quadrupole moment
datum otkrića1972
parity+

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

217Pa

Maseni broj217
broj neutrona126
relative atomic mass
217,018309024 ± 0,000013417 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,8 ± 0,2 ms
spin9/2
nuclear quadrupole moment
datum otkrića1968
parity-

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

218Pa

Maseni broj218
broj neutrona127
relative atomic mass
218,020021133 ± 0,000019158 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
108 ± 5 us
spin8
nuclear quadrupole moment
datum otkrića1979
parity-

decay modeintensity
α (α emission)100%

219Pa

Maseni broj219
broj neutrona128
relative atomic mass
219,019949909 ± 0,000074831 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
56 ± 9 ns
spin9/2
nuclear quadrupole moment
datum otkrića2005
parity-

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

220Pa

Maseni broj220
broj neutrona129
relative atomic mass
220,021769753 ± 0,000015732 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
0,85 ± 0,06 us
spin1
nuclear quadrupole moment
datum otkrića2005
parity-

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

221Pa

Maseni broj221
broj neutrona130
relative atomic mass
221,021873393 ± 0,000063746 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
5,9 ± 1,7 us
spin9/2
nuclear quadrupole moment
datum otkrića1983
parity-

decay modeintensity
α (α emission)100%

222Pa

Maseni broj222
broj neutrona131
relative atomic mass
222,023687064 ± 0,000092975 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,8 ± 0,2 ms
spin1
nuclear quadrupole moment
datum otkrića1970
parity-

decay modeintensity
α (α emission)100%

223Pa

Maseni broj223
broj neutrona132
relative atomic mass
223,023980414 ± 0,000081193 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
5,3 ± 0,3 ms
spin9/2
nuclear quadrupole moment
datum otkrića1970
parity-

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

224Pa

Maseni broj224
broj neutrona133
relative atomic mass
224,025617286 ± 0,000008145 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
844 ± 19 ms
spin5
nuclear quadrupole moment
datum otkrića1958
parity-

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

225Pa

Maseni broj225
broj neutrona134
relative atomic mass
225,026147927 ± 0,000087887 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,71 ± 0,1 s
spin5/2
nuclear quadrupole moment
datum otkrića1958
parity-

decay modeintensity
α (α emission)100%

226Pa

Maseni broj226
broj neutrona135
relative atomic mass
226,027948217 ± 0,000012037 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,8 ± 0,2 m
spin1
nuclear quadrupole moment
datum otkrića1949
parity-

decay modeintensity
α (α emission)74%
β+ (β+ decay; β+ = ϵ + e+)26%

227Pa

Maseni broj227
broj neutrona136
relative atomic mass
227,028803586 ± 0,000007797 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
38,3 ± 0,3 m
spin5/2
nuclear quadrupole moment
datum otkrića1948
parity-

decay modeintensity
α (α emission)85%
ϵ (electron capture)15%

228Pa

Maseni broj228
broj neutrona137
relative atomic mass
228,031050758 ± 0,000004659 Da
g-factor
1,1666666666667 ± 0,16666666666667
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
22 ± 1 h
spin3
nuclear quadrupole moment
datum otkrića1948
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)98.15%
α (α emission)1.85%

229Pa

Maseni broj229
broj neutrona138
relative atomic mass
229,032095585 ± 0,000003521 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,55 ± 0,04 d
spin5/2
nuclear quadrupole moment
datum otkrića1949
parity+

decay modeintensity
ϵ (electron capture)99.51%
α (α emission)0.49%

230Pa

Maseni broj230
broj neutrona139
relative atomic mass
230,034539717 ± 0,000003261 Da
g-factor
1 ± 0,1
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
17,4 ± 0,5 d
spin2
nuclear quadrupole moment
datum otkrića1948
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)92.2%
β (β decay)7.8%
α (α emission)0.0032%

231Pa

Maseni broj231
broj neutrona140
relative atomic mass
231,0358825 ± 0,000001901 Da
g-factor
1,3266666666667 ± 0,013333333333333
natural abundance
100
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
32,65 ± 0,2 ky
spin3/2
nuclear quadrupole moment
-1,72 ± 0,05
datum otkrića1918
parity-

decay modeintensity
α (α emission)100%
SF (spontaneous fission)3%
24Ne (heavy cluster emission)13.4%
23F9.9%

232Pa

Maseni broj232
broj neutrona141
relative atomic mass
232,038590205 ± 0,000008206 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,32 ± 0,02 d
spin2
nuclear quadrupole moment
datum otkrića1949
parity-

decay modeintensity
β (β decay)100%
ϵ (electron capture)

233Pa

Maseni broj233
broj neutrona142
relative atomic mass
233,040246535 ± 0,000001433 Da
g-factor
2,6666666666667 ± 0,46666666666667
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
26,975 ± 0,013 d
spin3/2
nuclear quadrupole moment
-3 ± 0,4
datum otkrića1938
parity-

decay modeintensity
β (β decay)100%

234Pa

Maseni broj234
broj neutrona143
relative atomic mass
234,043305555 ± 0,000004395 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
6,7 ± 0,05 h
spin4
nuclear quadrupole moment
datum otkrića1913
parity+

decay modeintensity
β (β decay)100%

235Pa

Maseni broj235
broj neutrona144
relative atomic mass
235,045399 ± 0,000015 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
24,4 ± 0,2 m
spin3/2
nuclear quadrupole moment
datum otkrića1950
parity-

decay modeintensity
β (β decay)100%

236Pa

Maseni broj236
broj neutrona145
relative atomic mass
236,048668 ± 0,000015 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
9,1 ± 0,1 m
spin1
nuclear quadrupole moment
datum otkrića1963
parity

decay modeintensity
β (β decay)100%
β SF (β-delayed fission)6%

237Pa

Maseni broj237
broj neutrona146
relative atomic mass
237,051023 ± 0,000014 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
8,7 ± 0,2 m
spin1/2
nuclear quadrupole moment
0
datum otkrića1954
parity+

decay modeintensity
β (β decay)100%

238Pa

Maseni broj238
broj neutrona147
relative atomic mass
238,054637 ± 0,000017 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
2,28 ± 0,09 m
spin3
nuclear quadrupole moment
datum otkrića1968
parity-

decay modeintensity
β (β decay)100%
β SF (β-delayed fission)2.6%

239Pa

Maseni broj239
broj neutrona148
relative atomic mass
239,05726 ± 0,00021 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,8 ± 0,5 h
spin1/2
nuclear quadrupole moment
0
datum otkrića1995
parity+

decay modeintensity
β (β decay)100%

240Pa

Maseni broj240
broj neutrona149
relative atomic mass
240,061203 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin3
nuclear quadrupole moment
datum otkrića
parity+

decay modeintensity
β (β decay)

241Pa

Maseni broj241
broj neutrona150
relative atomic mass
241,064134 ± 0,000322 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin1/2
nuclear quadrupole moment
0
datum otkrića
parity+

decay modeintensity
β (β decay)
Protactinium-233

historija

otkrivač ili izumiteljFredrich Soddy, John Cranston, Otto Hahn, Lise Meitner
mjesto otkrićaEngland/France
datum otkrića1917
EtimologijaGreek: proto and actinium (parent of actinium); it forms actinium when it radioactively decays.
pronunciationPRO-tak-tin-eh-em (engleski)

izvor

Abundance
Abundance in Earth's crust
0,0000014 mg/kg
natural abundance (okean)
0,00000000005 mg/L
natural abundance (ljudsko tijelo)
0 %
natural abundance (Meteoroidi)
natural abundance (Sunce)
Abundance in Universe
0 %

Nuclear Screening Constants