Protaktinium (Pa)

element with symbol Pa and atomic number of 91

Atomic Number	91
Atomic Weight	231.03588
Nombor jisim	231

Group
Period	7
Block	f

proton	91 p⁺
neutron	140 n⁰
Elektron	91 e^-

Animated Model Bohr of Pa (Protaktinium)

Sifat Fizikal

Jejari Atom	180 pm 285 pm
molar volume	15 cm³/mol
Jejari kovalen	169 pm 138 pm 129 pm 200 pm
Metallic Radius
ionic radius	104 pm 90 pm 101 pm 78 pm 91 pm 95 pm 119.9 pm
Crystal Radius	118 pm 104 pm 115 pm 92 pm 105 pm 109 pm 133.9 pm
Jejari van der Waals	243 pm 264 pm 342.4 pm
ketumpatan	15.4 g/cm³

Sifat Kimia

tenaga

proton affinity
Pertalian elektron
ionization energy	5.89 eV/particle 11.9 eV/particle 19 eV/particle 30.9 eV/particle 44.3 eV/particle 72 eV/particle 85.1 eV/particle 98.9 eV/particle 111 eV/particle 137 eV/particle 153 eV/particle 187 eV/particle 203 eV/particle 292 eV/particle 316 eV/particle 342 eV/particle 369 eV/particle 395 eV/particle 423 eV/particle 460 eV/particle 488 eV/particle 518 eV/particle 546 eV/particle 690 eV/particle 720 eV/particle 760 eV/particle 790 eV/particle 880 eV/particle 920 eV/particle 1,020 eV/particle 1,060 eV/particle 1,150 eV/particle 1,220 eV/particle 1,300 eV/particle 1,370 eV/particle 1,450 eV/particle 1,520 eV/particle 1,600 eV/particle 1,670 eV/particle 1,760 eV/particle 1,830 eV/particle 1,910 eV/particle 2,000 eV/particle 2,060 eV/particle 2,130 eV/particle 2,483 eV/particle 2,550 eV/particle 2,620 eV/particle 2,696 eV/particle 2,766 eV/particle 2,837 eV/particle 2,968 eV/particle 3,040 eV/particle 3,119 eV/particle 3,193 eV/particle 3,488 eV/particle 3,558 eV/particle 3,637 eV/particle 3,709 eV/particle 4,077 eV/particle 4,161 eV/particle 4,370 eV/particle 4,454 eV/particle 7,181 eV/particle 7,341 eV/particle 7,510 eV/particle 7,690 eV/particle 7,870 eV/particle 8,040 eV/particle 8,410 eV/particle 8,590 eV/particle 8,780 eV/particle 8,960 eV/particle 9,460 eV/particle 9,620 eV/particle 9,790 eV/particle 9,950 eV/particle 11,100 eV/particle 11,280 eV/particle 11,660 eV/particle 11,840 eV/particle 24,660 eV/particle 25,080 eV/particle 25,540 eV/particle 25,970 eV/particle 30,230 eV/particle 30,800 eV/particle 31,520 eV/particle 31,971.6 eV/particle 126,296.6 eV/particle 128,507 eV/particle

Entalpi pengewapan	481.2 kJ/mol
entalpi pelakuran	16.7 kJ/mol
standard enthalpy of formation	563 kJ/mol
Elektron

Petala elektron	2, 8, 18, 32, 20, 9, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Rn] 5f² 6d¹ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f² 6d¹ 7s²

Keadaan pengoksidaan	2, 3, 4, 5
Keelektronegatifan	0.12149 1.5
Electrophilicity Index
keadaan jirim asas

fasa jirim	Solid
gaseous state of matter
Boiling Point
Melting Point	1,845.15 K
critical pressure
critical temperature
triple point
rupa
warna	Silver #ffffff #00a1ff #00a1ff
rupa	bright, silvery metallic luster
indeks biasan
sifat bahan
Thermal Conductivity
Pengembangan terma
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type	Conductor
Kekonduksian elektrik	5.6 MS/m
Kerintangan dan kekonduksian elektrik	0.00000018 m Ω
Kesuperkonduksian	1.41 K
kemagnetan
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000325 m³/Kg
magnetic susceptibility (Molar)	0.000000007509 m³/mol
magnetic susceptibility (Volume)	0.0004995
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	Centered Tetragonal (TET)
lattice constant	3.92 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi
pengelasan
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	35
Mendeleev Number	18
Pettifor Number	46
Geochemical Class	U/Th decay series
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	154 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	200
Neutron Mass Absorption
Nombor kuantum	4K11/2
space group	139 (I4/mmm)

Isotopes of Protactinium

Stable Isotopes	0
Unstable Isotopes	31
Natural Isotopes	1

²¹¹Pa

Nombor jisim	211
nombor neutron	120
jisim atom relatif	211.023674036 ± 0.000074581 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	6 ± 3 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2006
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
p (proton emission)

²¹²Pa

Nombor jisim	212
nombor neutron	121
jisim atom relatif	212.023184819 ± 0.000094047 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.8 ± 1.9 ms
Spin	3
nuclear quadrupole moment
tarikh penemuan	1997
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%

²¹³Pa

Nombor jisim	213
nombor neutron	122
jisim atom relatif	213.021099644 ± 0.000061374 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	7.4 ± 2.4 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1995
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²¹⁴Pa

Nombor jisim	214
nombor neutron	123
jisim atom relatif	214.020891055 ± 0.00008718 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	17 ± 3 ms
Spin	7
nuclear quadrupole moment
tarikh penemuan	1995
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%

²¹⁵Pa

Nombor jisim	215
nombor neutron	124
jisim atom relatif	215.019113955 ± 0.000088513 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	14 ± 2 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1979
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²¹⁶Pa

Nombor jisim	216
nombor neutron	125
jisim atom relatif	216.019134633 ± 0.000026459 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	105 ± 12 ms
Spin	5
nuclear quadrupole moment
tarikh penemuan	1972
parity	+

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

²¹⁷Pa

Nombor jisim	217
nombor neutron	126
jisim atom relatif	217.018309024 ± 0.000013417 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.8 ± 0.2 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁻ (β⁻ decay)

²¹⁸Pa

Nombor jisim	218
nombor neutron	127
jisim atom relatif	218.020021133 ± 0.000019158 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	108 ± 5 us
Spin	8
nuclear quadrupole moment
tarikh penemuan	1979
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²¹⁹Pa

Nombor jisim	219
nombor neutron	128
jisim atom relatif	219.019949909 ± 0.000074831 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	56 ± 9 ns
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2005
parity	-

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

²²⁰Pa

Nombor jisim	220
nombor neutron	129
jisim atom relatif	220.021769753 ± 0.000015732 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	0.85 ± 0.06 us
Spin	1
nuclear quadrupole moment
tarikh penemuan	2005
parity	-

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

²²¹Pa

Nombor jisim	221
nombor neutron	130
jisim atom relatif	221.021873393 ± 0.000063746 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.9 ± 1.7 us
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1983
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²²Pa

Nombor jisim	222
nombor neutron	131
jisim atom relatif	222.023687064 ± 0.000092975 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.8 ± 0.2 ms
Spin	1
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²³Pa

Nombor jisim	223
nombor neutron	132
jisim atom relatif	223.023980414 ± 0.000081193 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.3 ± 0.3 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

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

²²⁴Pa

Nombor jisim	224
nombor neutron	133
jisim atom relatif	224.025617286 ± 0.000008145 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	844 ± 19 ms
Spin	5
nuclear quadrupole moment
tarikh penemuan	1958
parity	-

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

²²⁵Pa

Nombor jisim	225
nombor neutron	134
jisim atom relatif	225.026147927 ± 0.000087887 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.71 ± 0.1 s
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1958
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%

²²⁶Pa

Nombor jisim	226
nombor neutron	135
jisim atom relatif	226.027948217 ± 0.000012037 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.8 ± 0.2 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
α (α emission)	74%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	26%

²²⁷Pa

Nombor jisim	227
nombor neutron	136
jisim atom relatif	227.028803586 ± 0.000007797 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	38.3 ± 0.3 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1948
parity	-

decay mode	Keamatan (fizik)
α (α emission)	85%
ϵ (electron capture)	15%

²²⁸Pa

Nombor jisim	228
nombor neutron	137
jisim atom relatif	228.031050758 ± 0.000004659 Da
g-factor	1.1666666666667 ± 0.16666666666667
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	22 ± 1 h
Spin	3
nuclear quadrupole moment
tarikh penemuan	1948
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98.15%
α (α emission)	1.85%

²²⁹Pa

Nombor jisim	229
nombor neutron	138
jisim atom relatif	229.032095585 ± 0.000003521 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.55 ± 0.04 d
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1949
parity	+

decay mode	Keamatan (fizik)
ϵ (electron capture)	99.51%
α (α emission)	0.49%

²³⁰Pa

Nombor jisim	230
nombor neutron	139
jisim atom relatif	230.034539717 ± 0.000003261 Da
g-factor	1 ± 0.1
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	17.4 ± 0.5 d
Spin	2
nuclear quadrupole moment
tarikh penemuan	1948
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	92.2%
β⁻ (β⁻ decay)	7.8%
α (α emission)	0.0032%

²³¹Pa

Nombor jisim	231
nombor neutron	140
jisim atom relatif	231.0358825 ± 0.000001901 Da
g-factor	1.3266666666667 ± 0.013333333333333
natural abundance	100
Reputan radioaktif	☢️ radioactive element
setengah hayat	32.65 ± 0.2 ky
Spin	3/2
nuclear quadrupole moment	-1.72 ± 0.05
tarikh penemuan	1918
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	3%
24Ne (heavy cluster emission)	13.4%
23F	9.9%

²³²Pa

Nombor jisim	232
nombor neutron	141
jisim atom relatif	232.038590205 ± 0.000008206 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.32 ± 0.02 d
Spin	2
nuclear quadrupole moment
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
ϵ (electron capture)

²³³Pa

Nombor jisim	233
nombor neutron	142
jisim atom relatif	233.040246535 ± 0.000001433 Da
g-factor	2.6666666666667 ± 0.46666666666667
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	26.975 ± 0.013 d
Spin	3/2
nuclear quadrupole moment	-3 ± 0.4
tarikh penemuan	1938
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²³⁴Pa

Nombor jisim	234
nombor neutron	143
jisim atom relatif	234.043305555 ± 0.000004395 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	6.7 ± 0.05 h
Spin	4
nuclear quadrupole moment
tarikh penemuan	1913
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²³⁵Pa

Nombor jisim	235
nombor neutron	144
jisim atom relatif	235.045399 ± 0.000015 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	24.4 ± 0.2 m
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1950
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²³⁶Pa

Nombor jisim	236
nombor neutron	145
jisim atom relatif	236.048668 ± 0.000015 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	9.1 ± 0.1 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1963
parity

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)	6%

²³⁷Pa

Nombor jisim	237
nombor neutron	146
jisim atom relatif	237.051023 ± 0.000014 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	8.7 ± 0.2 m
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²³⁸Pa

Nombor jisim	238
nombor neutron	147
jisim atom relatif	238.054637 ± 0.000017 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.28 ± 0.09 m
Spin	3
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)	2.6%

²³⁹Pa

Nombor jisim	239
nombor neutron	148
jisim atom relatif	239.05726 ± 0.00021 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.8 ± 0.5 h
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1995
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁰Pa

Nombor jisim	240
nombor neutron	149
jisim atom relatif	240.061203 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	3
nuclear quadrupole moment
tarikh penemuan
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)

²⁴¹Pa

Nombor jisim	241
nombor neutron	150
jisim atom relatif	241.064134 ± 0.000322 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)

sejarah

penemu atau pereka	Fredrich Soddy, John Cranston, Otto Hahn, Lise Meitner
tempat penemuan	England/France
tarikh penemuan	1917
Etimologi	Greek: proto and actinium (parent of actinium); it forms actinium when it radioactively decays.
sebutan	PRO-tak-tin-eh-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust	0.0000014 mg/kg
natural abundance (lautan)	0.00000000005 mg/L
natural abundance (Tubuh manusia)	0 %
natural abundance (Meteoroid)
natural abundance (Matahari)
Abundance in Universe	0 %

Nuclear Screening Constants

Protaktinium on ChemicalAid

ChEBI ID	33386
ChemSpider ID	22387
DSSTOX compound identifier	DTXCID50147878
ECHA Substance Infocard ID	100.122.906
Encyclopedia of China ID (Second Edition)	224618
ID CAB	7539
ID Den Store Danske	protactinium
ID Elhuyar ZTH	030190
ID Encyclopædia Universalis	protactinium
ID Ensiklopedia Besar Rusia dalam talian	3168919
ID Ensiklopedia Britannica Dalam Talian	science/protactinium
ID Freebase	/m/025s7xw
ID GND	4175981-3
ID Gran Enciclopèdia Catalana	0135204
ID J9U Perpustakaan Negara Israel	987007541390005171
ID KBpedia	Protactinium
ID Namuwiki	프로트악티늄
ID Perbendaharaan Kata Pendidikan Australia	scot/3563
ID Store norske leksikon	protactinium
ID Treccani	protoattinio
ID Vikidia Perancis	Protactinium
ID WordNet 3.1 Synset	14675887-n
ID bahan DSSTox	DTXSID50225387
ID kewibawaan Perpustakaan Kongres	sh85107634
ID pemerihal MeSH	D011478
ID topik Quora	Protactinium
InChI	InChI=1S/Pa
InChIKey	XLROVYAPLOFLNU-UHFFFAOYSA-N
Maksud Tertakrif OmegaWiki	345414
NALT ID	3207
OpenAlex ID	C505015426
PubChem CID	23945
Römpp online ID	RD-16-04500
UNII	0S6855V29M
USGS Thesaurus ID	1547
nombor pendaftaran CAS	7440-13-3

Protaktinium (Pa)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Protactinium

211Pa

212Pa

213Pa

214Pa

215Pa

216Pa

217Pa

218Pa

219Pa

220Pa

221Pa

222Pa

223Pa

224Pa

225Pa

226Pa

227Pa

228Pa

229Pa

230Pa

231Pa

232Pa

233Pa

234Pa

235Pa

236Pa

237Pa

238Pa

239Pa

240Pa

241Pa

sejarah

sumber

Nuclear Screening Constants

²¹¹Pa

²¹²Pa

²¹³Pa

²¹⁴Pa

²¹⁵Pa

²¹⁶Pa

²¹⁷Pa

²¹⁸Pa

²¹⁹Pa

²²⁰Pa

²²¹Pa

²²²Pa

²²³Pa

²²⁴Pa

²²⁵Pa

²²⁶Pa

²²⁷Pa

²²⁸Pa

²²⁹Pa

²³⁰Pa

²³¹Pa

²³²Pa

²³³Pa

²³⁴Pa

²³⁵Pa

²³⁶Pa

²³⁷Pa

²³⁸Pa

²³⁹Pa

²⁴⁰Pa

²⁴¹Pa