Proaktinyûm

Proaktinyûm (Pa)

element with symbol Pa and atomic number of 91
Atomic Number91
Atomic Weight231.03588
Hejmara baristeyî231
Group
Period7
Blockf
Proton91 p+
Notron140 n0
Kareva91 e-
Animated Bohr model of Pa (Proaktinyûm)

Physical Property

Atomic Radius
180 pm
molar volume
Covalent Radius
169 pm
Metallic Radius
ionic radius
104 pm
Crystal Radius
118 pm
Van der Waals radius
243 pm
density
15,4 g/cm³
Atomic Radii Of The Elements: Proaktinyûm0102030405060708090100110120130140150160170180190200210220230240250pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

wize
proton affinity
electron affinity
ionization energy
ionization energy of Pa (Proaktinyûm)
enthalpy of vaporization
481,2 kJ/mol
enthalpy of fusion
16,7 kJ/mol
standard enthalpy of formation
563 kJ/mol
Kareva
electron shell2, 8, 18, 32, 20, 9, 2
Bohr model: Pa (Proaktinyûm)
valence electron2
Lewis structure: Pa (Proaktinyûm)
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 Bohr model of Pa (Proaktinyûm)
Orbital Diagram of Pa (Proaktinyûm)
oxidation number2, 3, 4, 5
electronegativity
1.5
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
1.845,15 K
critical pressure
critical temperature
triple point
appearance
color
Silver
appearancebright, silvery metallic luster
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
5,6 MS/m
electrical resistivity
0,00000018 m Ω
superconductivity
1,41 K
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0,0000000325 m³/Kg
magnetic susceptibility (Molar)
0,000000007509 m³/mol
magnetic susceptibility (Volume)
0,0004995
magnetic ordering
Germahiya Curie
Néel temperature
pêkhate
Crystal StructureCentered Tetragonal (TET)
lattice constant
3,92 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Leza dengê
classification
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
quantum number4K11/2
space group139 (I4/mmm)

Isotopes of Protactinium

Stable Isotopes0
Unstable Isotopes31
Natural Isotopes1

211Pa

Hejmara baristeyî211
neutron number120
Giraniya atomê
211,023674036 ± 0,000074581 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
6 ± 3 ms
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê2006
parity-

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

212Pa

Hejmara baristeyî212
neutron number121
Giraniya atomê
212,023184819 ± 0,000094047 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5,8 ± 1,9 ms
spin3
nuclear quadrupole moment
dema îcadkirinê yan keşfê1997
parity+

decay modeintensity
α (α emission)100%

213Pa

Hejmara baristeyî213
neutron number122
Giraniya atomê
213,021099644 ± 0,000061374 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
7,4 ± 2,4 ms
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1995
parity-

decay modeintensity
α (α emission)100%

214Pa

Hejmara baristeyî214
neutron number123
Giraniya atomê
214,020891055 ± 0,00008718 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
17 ± 3 ms
spin7
nuclear quadrupole moment
dema îcadkirinê yan keşfê1995
parity+

decay modeintensity
α (α emission)100%

215Pa

Hejmara baristeyî215
neutron number124
Giraniya atomê
215,019113955 ± 0,000088513 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
14 ± 2 ms
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1979
parity-

decay modeintensity
α (α emission)100%

216Pa

Hejmara baristeyî216
neutron number125
Giraniya atomê
216,019134633 ± 0,000026459 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
105 ± 12 ms
spin5
nuclear quadrupole moment
dema îcadkirinê yan keşfê1972
parity+

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

217Pa

Hejmara baristeyî217
neutron number126
Giraniya atomê
217,018309024 ± 0,000013417 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3,8 ± 0,2 ms
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1968
parity-

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

218Pa

Hejmara baristeyî218
neutron number127
Giraniya atomê
218,020021133 ± 0,000019158 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
108 ± 5 us
spin8
nuclear quadrupole moment
dema îcadkirinê yan keşfê1979
parity-

decay modeintensity
α (α emission)100%

219Pa

Hejmara baristeyî219
neutron number128
Giraniya atomê
219,019949909 ± 0,000074831 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
56 ± 9 ns
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê2005
parity-

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

220Pa

Hejmara baristeyî220
neutron number129
Giraniya atomê
220,021769753 ± 0,000015732 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
0,85 ± 0,06 us
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê2005
parity-

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

221Pa

Hejmara baristeyî221
neutron number130
Giraniya atomê
221,021873393 ± 0,000063746 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5,9 ± 1,7 us
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1983
parity-

decay modeintensity
α (α emission)100%

222Pa

Hejmara baristeyî222
neutron number131
Giraniya atomê
222,023687064 ± 0,000092975 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3,8 ± 0,2 ms
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê1970
parity-

decay modeintensity
α (α emission)100%

223Pa

Hejmara baristeyî223
neutron number132
Giraniya atomê
223,023980414 ± 0,000081193 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
5,3 ± 0,3 ms
spin9/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1970
parity-

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

224Pa

Hejmara baristeyî224
neutron number133
Giraniya atomê
224,025617286 ± 0,000008145 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
844 ± 19 ms
spin5
nuclear quadrupole moment
dema îcadkirinê yan keşfê1958
parity-

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

225Pa

Hejmara baristeyî225
neutron number134
Giraniya atomê
225,026147927 ± 0,000087887 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,71 ± 0,1 s
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1958
parity-

decay modeintensity
α (α emission)100%

226Pa

Hejmara baristeyî226
neutron number135
Giraniya atomê
226,027948217 ± 0,000012037 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,8 ± 0,2 m
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê1949
parity-

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

227Pa

Hejmara baristeyî227
neutron number136
Giraniya atomê
227,028803586 ± 0,000007797 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
38,3 ± 0,3 m
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1948
parity-

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

228Pa

Hejmara baristeyî228
neutron number137
Giraniya atomê
228,031050758 ± 0,000004659 Da
g-factor
1,1666666666667 ± 0,16666666666667
natural abundance
radioactivity☢️ radioactive element
half-life
22 ± 1 h
spin3
nuclear quadrupole moment
dema îcadkirinê yan keşfê1948
parity+

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

229Pa

Hejmara baristeyî229
neutron number138
Giraniya atomê
229,032095585 ± 0,000003521 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,55 ± 0,04 d
spin5/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1949
parity+

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

230Pa

Hejmara baristeyî230
neutron number139
Giraniya atomê
230,034539717 ± 0,000003261 Da
g-factor
1 ± 0,1
natural abundance
radioactivity☢️ radioactive element
half-life
17,4 ± 0,5 d
spin2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1948
parity-

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

231Pa

Hejmara baristeyî231
neutron number140
Giraniya atomê
231,0358825 ± 0,000001901 Da
g-factor
1,3266666666667 ± 0,013333333333333
natural abundance
100
radioactivity☢️ radioactive element
half-life
32,65 ± 0,2 ky
spin3/2
nuclear quadrupole moment
-1,72 ± 0,05
dema îcadkirinê yan keşfê1918
parity-

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

232Pa

Hejmara baristeyî232
neutron number141
Giraniya atomê
232,038590205 ± 0,000008206 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,32 ± 0,02 d
spin2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1949
parity-

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

233Pa

Hejmara baristeyî233
neutron number142
Giraniya atomê
233,040246535 ± 0,000001433 Da
g-factor
2,6666666666667 ± 0,46666666666667
natural abundance
radioactivity☢️ radioactive element
half-life
26,975 ± 0,013 d
spin3/2
nuclear quadrupole moment
-3 ± 0,4
dema îcadkirinê yan keşfê1938
parity-

decay modeintensity
β (β decay)100%

234Pa

Hejmara baristeyî234
neutron number143
Giraniya atomê
234,043305555 ± 0,000004395 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
6,7 ± 0,05 h
spin4
nuclear quadrupole moment
dema îcadkirinê yan keşfê1913
parity+

decay modeintensity
β (β decay)100%

235Pa

Hejmara baristeyî235
neutron number144
Giraniya atomê
235,045399 ± 0,000015 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
24,4 ± 0,2 m
spin3/2
nuclear quadrupole moment
dema îcadkirinê yan keşfê1950
parity-

decay modeintensity
β (β decay)100%

236Pa

Hejmara baristeyî236
neutron number145
Giraniya atomê
236,048668 ± 0,000015 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
9,1 ± 0,1 m
spin1
nuclear quadrupole moment
dema îcadkirinê yan keşfê1963
parity

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

237Pa

Hejmara baristeyî237
neutron number146
Giraniya atomê
237,051023 ± 0,000014 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
8,7 ± 0,2 m
spin1/2
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1954
parity+

decay modeintensity
β (β decay)100%

238Pa

Hejmara baristeyî238
neutron number147
Giraniya atomê
238,054637 ± 0,000017 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2,28 ± 0,09 m
spin3
nuclear quadrupole moment
dema îcadkirinê yan keşfê1968
parity-

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

239Pa

Hejmara baristeyî239
neutron number148
Giraniya atomê
239,05726 ± 0,00021 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,8 ± 0,5 h
spin1/2
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê1995
parity+

decay modeintensity
β (β decay)100%

240Pa

Hejmara baristeyî240
neutron number149
Giraniya atomê
240,061203 ± 0,000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3
nuclear quadrupole moment
dema îcadkirinê yan keşfê
parity+

decay modeintensity
β (β decay)

241Pa

Hejmara baristeyî241
neutron number150
Giraniya atomê
241,064134 ± 0,000322 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
dema îcadkirinê yan keşfê
parity+

decay modeintensity
β (β decay)
Protactinium-233

dîrok

kaşîf an îcadkerFredrich Soddy, John Cranston, Otto Hahn, Lise Meitner
location of discoveryEngland/France
dema îcadkirinê yan keşfê1917
BêjenasîGreek: proto and actinium (parent of actinium); it forms actinium when it radioactively decays.
pronunciationPRO-tak-tin-eh-em (îngilîzî)

source

Abundance
Abundance in Earth's crust
0,0000014 mg/kg
natural abundance (Okyanûs)
0,00000000005 mg/L
natural abundance (human body)
0 %
natural abundance (meteoroid)
natural abundance (Roj)
Abundance in Universe
0 %

Nuclear Screening Constants