Protaktin, ²Protactiniumi

Protaktin, ²Protactiniumi (Pa)

element with symbol Pa and atomic number of 91
Atomic Number91
Atomic Weight231.03588
Numri i masës231
Group
Period7
Blockf
protoni91 p+
neutroni140 n0
elektroni91 e-
Animated Bohr model of Pa (Protaktin, ²Protactiniumi)

Tipar Fizik

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: Protaktin, ²Protactiniumi0255075100125150175200225250pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energjia
proton affinity
electron affinity
ionization energy
ionization energy of Pa (Protaktin, ²Protactiniumi)
enthalpy of vaporization
481,2 kJ/mol
enthalpy of fusion
16,7 kJ/mol
standard enthalpy of formation
563 kJ/mol
elektroni
electron shell2, 8, 18, 32, 20, 9, 2
Bohr model: Pa (Protaktin, ²Protactiniumi)
valence electron2
Lewis structure: Pa (Protaktin, ²Protactiniumi)
konfigurimi i elektronit[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 (Protaktin, ²Protactiniumi)
Orbital Diagram of Pa (Protaktin, ²Protactiniumi)
oxidation number2, 3, 4, 5
Elektronegativiteti
1.5
Electrophilicity Index
fundamental state of matter
gjendja agregate e materiesSolid
gaseous state of matter
Boiling Point
Melting Point
1 845,15 K
critical pressure
critical temperature
triple point
appearance
Ngjyra
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
Superpërcjellshmëria
1,41 K
Magnetizimi
typeparamagnetic
magnetic susceptibility (Mass)
0,0000000325 m³/Kg
magnetic susceptibility (Molar)
0,000000007509 m³/mol
magnetic susceptibility (Volume)
0,0004995
magnetic ordering
Curie temperature
Néel temperature
strukturë
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
Shpejtësia e zërit
klasifikim
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
numër kuantik4K11/2
space group139 (I4/mmm)

Isotopes of Protactinium

Stable Isotopes0
Unstable Isotopes31
Natural Isotopes1

211Pa

Numri i masës211
numri i neutroneve120
relative atomic mass
211,023674036 ± 0,000074581 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
6 ± 3 ms
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes2006
parity-

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

212Pa

Numri i masës212
numri i neutroneve121
relative atomic mass
212,023184819 ± 0,000094047 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
5,8 ± 1,9 ms
Spini3
nuclear quadrupole moment
koha e zbulimit apo shpikjes1997
parity+

decay modeintensitet
α (α emission)100%

213Pa

Numri i masës213
numri i neutroneve122
relative atomic mass
213,021099644 ± 0,000061374 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
7,4 ± 2,4 ms
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1995
parity-

decay modeintensitet
α (α emission)100%

214Pa

Numri i masës214
numri i neutroneve123
relative atomic mass
214,020891055 ± 0,00008718 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
17 ± 3 ms
Spini7
nuclear quadrupole moment
koha e zbulimit apo shpikjes1995
parity+

decay modeintensitet
α (α emission)100%

215Pa

Numri i masës215
numri i neutroneve124
relative atomic mass
215,019113955 ± 0,000088513 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
14 ± 2 ms
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1979
parity-

decay modeintensitet
α (α emission)100%

216Pa

Numri i masës216
numri i neutroneve125
relative atomic mass
216,019134633 ± 0,000026459 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
105 ± 12 ms
Spini5
nuclear quadrupole moment
koha e zbulimit apo shpikjes1972
parity+

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

217Pa

Numri i masës217
numri i neutroneve126
relative atomic mass
217,018309024 ± 0,000013417 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
3,8 ± 0,2 ms
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1968
parity-

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

218Pa

Numri i masës218
numri i neutroneve127
relative atomic mass
218,020021133 ± 0,000019158 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
108 ± 5 us
Spini8
nuclear quadrupole moment
koha e zbulimit apo shpikjes1979
parity-

decay modeintensitet
α (α emission)100%

219Pa

Numri i masës219
numri i neutroneve128
relative atomic mass
219,019949909 ± 0,000074831 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
56 ± 9 ns
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes2005
parity-

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

220Pa

Numri i masës220
numri i neutroneve129
relative atomic mass
220,021769753 ± 0,000015732 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
0,85 ± 0,06 us
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes2005
parity-

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

221Pa

Numri i masës221
numri i neutroneve130
relative atomic mass
221,021873393 ± 0,000063746 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
5,9 ± 1,7 us
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1983
parity-

decay modeintensitet
α (α emission)100%

222Pa

Numri i masës222
numri i neutroneve131
relative atomic mass
222,023687064 ± 0,000092975 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
3,8 ± 0,2 ms
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes1970
parity-

decay modeintensitet
α (α emission)100%

223Pa

Numri i masës223
numri i neutroneve132
relative atomic mass
223,023980414 ± 0,000081193 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
5,3 ± 0,3 ms
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1970
parity-

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

224Pa

Numri i masës224
numri i neutroneve133
relative atomic mass
224,025617286 ± 0,000008145 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
844 ± 19 ms
Spini5
nuclear quadrupole moment
koha e zbulimit apo shpikjes1958
parity-

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

225Pa

Numri i masës225
numri i neutroneve134
relative atomic mass
225,026147927 ± 0,000087887 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,71 ± 0,1 s
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1958
parity-

decay modeintensitet
α (α emission)100%

226Pa

Numri i masës226
numri i neutroneve135
relative atomic mass
226,027948217 ± 0,000012037 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,8 ± 0,2 m
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes1949
parity-

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

227Pa

Numri i masës227
numri i neutroneve136
relative atomic mass
227,028803586 ± 0,000007797 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
38,3 ± 0,3 m
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1948
parity-

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

228Pa

Numri i masës228
numri i neutroneve137
relative atomic mass
228,031050758 ± 0,000004659 Da
g-factor
1,1666666666667 ± 0,16666666666667
natural abundance
Radioaktivitet☢️ radioactive element
half-life
22 ± 1 h
Spini3
nuclear quadrupole moment
koha e zbulimit apo shpikjes1948
parity+

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

229Pa

Numri i masës229
numri i neutroneve138
relative atomic mass
229,032095585 ± 0,000003521 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,55 ± 0,04 d
Spini5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1949
parity+

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

230Pa

Numri i masës230
numri i neutroneve139
relative atomic mass
230,034539717 ± 0,000003261 Da
g-factor
1 ± 0,1
natural abundance
Radioaktivitet☢️ radioactive element
half-life
17,4 ± 0,5 d
Spini2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1948
parity-

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

231Pa

Numri i masës231
numri i neutroneve140
relative atomic mass
231,0358825 ± 0,000001901 Da
g-factor
1,3266666666667 ± 0,013333333333333
natural abundance
100
Radioaktivitet☢️ radioactive element
half-life
32,65 ± 0,2 ky
Spini3/2
nuclear quadrupole moment
-1,72 ± 0,05
koha e zbulimit apo shpikjes1918
parity-

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

232Pa

Numri i masës232
numri i neutroneve141
relative atomic mass
232,038590205 ± 0,000008206 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,32 ± 0,02 d
Spini2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1949
parity-

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

233Pa

Numri i masës233
numri i neutroneve142
relative atomic mass
233,040246535 ± 0,000001433 Da
g-factor
2,6666666666667 ± 0,46666666666667
natural abundance
Radioaktivitet☢️ radioactive element
half-life
26,975 ± 0,013 d
Spini3/2
nuclear quadrupole moment
-3 ± 0,4
koha e zbulimit apo shpikjes1938
parity-

decay modeintensitet
β (β decay)100%

234Pa

Numri i masës234
numri i neutroneve143
relative atomic mass
234,043305555 ± 0,000004395 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
6,7 ± 0,05 h
Spini4
nuclear quadrupole moment
koha e zbulimit apo shpikjes1913
parity+

decay modeintensitet
β (β decay)100%

235Pa

Numri i masës235
numri i neutroneve144
relative atomic mass
235,045399 ± 0,000015 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
24,4 ± 0,2 m
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1950
parity-

decay modeintensitet
β (β decay)100%

236Pa

Numri i masës236
numri i neutroneve145
relative atomic mass
236,048668 ± 0,000015 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
9,1 ± 0,1 m
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes1963
parity

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

237Pa

Numri i masës237
numri i neutroneve146
relative atomic mass
237,051023 ± 0,000014 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
8,7 ± 0,2 m
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1954
parity+

decay modeintensitet
β (β decay)100%

238Pa

Numri i masës238
numri i neutroneve147
relative atomic mass
238,054637 ± 0,000017 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
2,28 ± 0,09 m
Spini3
nuclear quadrupole moment
koha e zbulimit apo shpikjes1968
parity-

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

239Pa

Numri i masës239
numri i neutroneve148
relative atomic mass
239,05726 ± 0,00021 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,8 ± 0,5 h
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1995
parity+

decay modeintensitet
β (β decay)100%

240Pa

Numri i masës240
numri i neutroneve149
relative atomic mass
240,061203 ± 0,000215 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini3
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity+

decay modeintensitet
β (β decay)

241Pa

Numri i masës241
numri i neutroneve150
relative atomic mass
241,064134 ± 0,000322 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes
parity+

decay modeintensitet
β (β decay)
Protactinium-233

historia

zbuluesFredrich Soddy, John Cranston, Otto Hahn, Lise Meitner
vendndodhja e zbulimitEngland/France
koha e zbulimit apo shpikjes1917
EtimologjiaGreek: proto and actinium (parent of actinium); it forms actinium when it radioactively decays.
pronunciationPRO-tak-tin-eh-em (anglisht)

burim

Abundance
Abundance in Earth's crust
0,0000014 mg/kg
natural abundance (Oqeani)
0,00000000005 mg/L
natural abundance (Trupi i njeriut)
0 %
natural abundance (meteoroid)
natural abundance (Diell)
Abundance in Universe
0 %

Nuclear Screening Constants