Aktinium (Ac)

chemical element with the atomic number of 89

Atomic Number	89
Atomic Weight	227
Nombor jisim	205

Group	3
Period	7
Block	d

proton	89 p⁺
neutron	116 n⁰
Elektron	89 e^-

Properties

sifat fizikal
Jejari atom	195 pm 293 pm
molar volume	22.54 cm³/mol
Jejari kovalen	186 pm 153 pm 140 pm 215 pm
Metallic Radius
ionic radius	112 pm 122 pm
Crystal Radius	126 pm 136 pm
Jejari van der Waals	247 pm 308 pm 347.8 pm
ketumpatan	10 g/cm³
tenaga
proton affinity
Pertalian elektron	0.35 eV/particle
ionization energy	5.380226 eV/particle 11.75 eV/particle 17.431 eV/particle 44.8 eV/particle 55 eV/particle 67 eV/particle 79 eV/particle 98.9 eV/particle 113.9 eV/particle 143.9 eV/particle 161.1 eV/particle 233 eV/particle 255 eV/particle 279 eV/particle 305 eV/particle 330 eV/particle 355 eV/particle 390 eV/particle 416 eV/particle 444 eV/particle 470 eV/particle 610 eV/particle 640 eV/particle 670 eV/particle 710 eV/particle 780 eV/particle 820 eV/particle 920 eV/particle 950 eV/particle 1,030 eV/particle 1,100 eV/particle 1,170 eV/particle 1,240 eV/particle 1,310 eV/particle 1,380 eV/particle 1,460 eV/particle 1,530 eV/particle 1,610 eV/particle 1,680 eV/particle 1,750 eV/particle 1,820 eV/particle 1,900 eV/particle 1,970 eV/particle 2,298 eV/particle 2,362 eV/particle 2,430 eV/particle 2,503 eV/particle 2,572 eV/particle 2,639 eV/particle 2,762 eV/particle 2,833 eV/particle 2,908 eV/particle 2,980 eV/particle 3,264 eV/particle 3,334 eV/particle 3,409 eV/particle 3,479 eV/particle 3,811 eV/particle 3,893 eV/particle 4,093 eV/particle 4,175 eV/particle 6,767 eV/particle 6,923 eV/particle 7,088 eV/particle 7,265 eV/particle 7,430 eV/particle 7,600 eV/particle 7,950 eV/particle 8,120 eV/particle 8,310 eV/particle 8,480 eV/particle 8,970 eV/particle 9,120 eV/particle 9,290 eV/particle 9,440 eV/particle 10,480 eV/particle 10,660 eV/particle 11,030 eV/particle 11,200 eV/particle 23,480 eV/particle 23,890 eV/particle 24,340 eV/particle 24,760 eV/particle 28,610 eV/particle 29,160 eV/particle 29,850 eV/particle 30,293 eV/particle 119,939 eV/particle 122,062.9 eV/particle

Entalpi pengewapan	292.9 kJ/mol
entalpi pelakuran	10.5 kJ/mol
standard enthalpy of formation	406 kJ/mol
Elektron
Petala elektron	2, 8, 18, 32, 18, 9, 2

Elektron valens	2 ⓘ

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

Keadaan pengoksidaan	2, 3
Keelektronegatifan	0.10033 1.1
Electrophilicity Index	0.8159546412794374 eV/particle
keadaan jirim asas
fasa jirim	Solid
gaseous state of matter
Boiling Point	3,473.15 K
Melting Point	1,323.15 K
critical pressure
critical temperature
triple point
rupa
warna	Silver #ffffff #70abfa #70abfa
rupa
indeks biasan
sifat bahan
Thermal Conductivity
Pengembangan terma
molar heat capacity	27.2 J/(mol K)
Specific Heat Capacity	0.12 J/(g⋅K)
heat capacity ratio
electrical properties
type
Kekonduksian elektrik
Kerintangan dan kekonduksian elektrik
Kesuperkonduksian
kemagnetan
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5.31 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	IIIA
IUPAC Group	IIIB
Glawe Number	33
Mendeleev Number	14
Pettifor Number	48
Geochemical Class	U/Th decay series
Goldschmidt classification	synthetic
other
Gas Basicity
polarizability	203 ± 12 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	880
Neutron Mass Absorption	0.078
Nombor kuantum	2D3/2
space group	225 (Fm_3m)

Isotopes of Actinium

Stable Isotopes	0
Unstable Isotopes	33
Radioactive Isotopes	33

²⁰⁵Ac

Nombor jisim	205
nombor neutron	116
jisim atom relatif	205.015144152 ± 0.000063682 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	80 ± 60 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2014
parity	-

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

²⁰⁶Ac

Nombor jisim	206
nombor neutron	117
jisim atom relatif	206.014476477 ± 0.000069874 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	25 ± 7 ms
Spin	3
nuclear quadrupole moment
tarikh penemuan	1998
parity	+

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

²⁰⁷Ac

Nombor jisim	207
nombor neutron	118
jisim atom relatif	207.011965967 ± 0.000060384 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	31 ± 8 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1994
parity	-

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

²⁰⁸Ac

Nombor jisim	208
nombor neutron	119
jisim atom relatif	208.011552251 ± 0.000069225 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	97 ± 15 ms
Spin	3
nuclear quadrupole moment
tarikh penemuan	1994
parity	+

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

²⁰⁹Ac

Nombor jisim	209
nombor neutron	120
jisim atom relatif	209.009495375 ± 0.000059953 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	94 ± 10 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

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

²¹⁰Ac

Nombor jisim	210
nombor neutron	121
jisim atom relatif	210.009408625 ± 0.000066782 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	350 ± 40 ms
Spin	7
nuclear quadrupole moment
tarikh penemuan	1968
parity	+

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

²¹¹Ac

Nombor jisim	211
nombor neutron	122
jisim atom relatif	211.007668846 ± 0.000057706 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	213 ± 25 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

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

²¹²Ac

Nombor jisim	212
nombor neutron	123
jisim atom relatif	212.007836442 ± 0.000023492 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	895 ± 28 ms
Spin	7
nuclear quadrupole moment
tarikh penemuan	1968
parity	+

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

²¹³Ac

Nombor jisim	213
nombor neutron	124
jisim atom relatif	213.006592665 ± 0.000012522 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	738 ± 16 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

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

²¹⁴Ac

Nombor jisim	214
nombor neutron	125
jisim atom relatif	214.0069064 ± 0.000014547 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	8.2 ± 0.2 s
Spin	5
nuclear quadrupole moment
tarikh penemuan	1968
parity	+

decay mode	Keamatan (fizik)
α (α emission)	93%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	7%

²¹⁵Ac

Nombor jisim	215
nombor neutron	126
jisim atom relatif	215.006474061 ± 0.000013318 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	171 ± 10 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.09%

²¹⁶Ac

Nombor jisim	216
nombor neutron	127
jisim atom relatif	216.008749101 ± 0.000009908 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	440 ± 16 us
Spin	1
nuclear quadrupole moment
tarikh penemuan	1967
parity	-

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

²¹⁷Ac

Nombor jisim	217
nombor neutron	128
jisim atom relatif	217.009342325 ± 0.000012048 Da
g-factor	0.85111111111111 ± 0.011111111111111
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	69 ± 4 ns
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1972
parity	-

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

²¹⁸Ac

Nombor jisim	218
nombor neutron	129
jisim atom relatif	218.01164886 ± 0.000061853 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1 ± 0.04 us
Spin	1
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

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

²¹⁹Ac

Nombor jisim	219
nombor neutron	130
jisim atom relatif	219.012420425 ± 0.000055263 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	9.4 ± 1 us
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

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

²²⁰Ac

Nombor jisim	220
nombor neutron	131
jisim atom relatif	220.014754527 ± 0.000006579 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	26.36 ± 0.19 ms
Spin	3
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

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

²²¹Ac

Nombor jisim	221
nombor neutron	132
jisim atom relatif	221.015599721 ± 0.000061086 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	52 ± 2 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1968
parity	-

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

²²²Ac

Nombor jisim	222
nombor neutron	133
jisim atom relatif	222.017844232 ± 0.000005044 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5 ± 0.5 s
Spin	1
nuclear quadrupole moment
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
α (α emission)	99%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	1%

²²³Ac

Nombor jisim	223
nombor neutron	134
jisim atom relatif	223.019135982 ± 0.000007457 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.1 ± 0.05 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1948
parity	-

decay mode	Keamatan (fizik)
α (α emission)	99%
ϵ (electron capture)

²²⁴Ac

Nombor jisim	224
nombor neutron	135
jisim atom relatif	224.021722249 ± 0.000004389 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.78 ± 0.16 h
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1948
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	90.5%
α (α emission)	9.5%
β⁻ (β⁻ decay)

²²⁵Ac

Nombor jisim	225
nombor neutron	136
jisim atom relatif	225.023228601 ± 0.000005107 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	9.919 ± 0.0021 d
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1947
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
14C	5.3%

²²⁶Ac

Nombor jisim	226
nombor neutron	137
jisim atom relatif	226.026096999 ± 0.000003327 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	29.37 ± 0.12 h
Spin	1
nuclear quadrupole moment
tarikh penemuan	1950
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	83%
ϵ (electron capture)	17%
α (α emission)	0.006%

²²⁷Ac

Nombor jisim	227
nombor neutron	138
jisim atom relatif	227.027750594 ± 0.000002068 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	21.772 ± 0.003 y
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1851
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	98.62%
α (α emission)	1.38%

²²⁸Ac

Nombor jisim	228
nombor neutron	139
jisim atom relatif	228.031019685 ± 0.000002247 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	6.15 ± 0.02 h
Spin	3
nuclear quadrupole moment
tarikh penemuan	1908
parity	+

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

²²⁹Ac

Nombor jisim	229
nombor neutron	140
jisim atom relatif	229.032947 ± 0.000013 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	62.7 ± 0.5 m
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1952
parity	+

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

²³⁰Ac

Nombor jisim	230
nombor neutron	141
jisim atom relatif	230.036327 ± 0.000017 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	122 ± 3 s
Spin	1
nuclear quadrupole moment
tarikh penemuan	1973
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ SF (β⁻-delayed fission)	1.2%

²³¹Ac

Nombor jisim	231
nombor neutron	142
jisim atom relatif	231.038393 ± 0.000014 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	7.5 ± 0.1 m
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1973
parity	+

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

²³²Ac

Nombor jisim	232
nombor neutron	143
jisim atom relatif	232.042034 ± 0.000014 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.98 ± 0.08 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1986
parity	+

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

²³³Ac

Nombor jisim	233
nombor neutron	144
jisim atom relatif	233.044346 ± 0.000014 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	143 ± 10 s
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1983
parity	+

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

²³⁴Ac

Nombor jisim	234
nombor neutron	145
jisim atom relatif	234.048139 ± 0.000015 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	45 ± 2 s
Spin	1
nuclear quadrupole moment
tarikh penemuan	1986
parity	+

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

²³⁵Ac

Nombor jisim	235
nombor neutron	146
jisim atom relatif	235.05084 ± 0.000015 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	62 ± 4 s
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	2006
parity	+

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

²³⁶Ac

Nombor jisim	236
nombor neutron	147
jisim atom relatif	236.054988 ± 0.000041 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	4.5 ± 3.6 m
Spin	3
nuclear quadrupole moment
tarikh penemuan	2010
parity	+

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

²³⁷Ac

Nombor jisim	237
nombor neutron	148
jisim atom relatif	237.057993 ± 0.000429 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	André Debierne
tempat penemuan	France
tarikh penemuan	1899
Etimologi	Greek: akis, aktinos (ray).
sebutan	ak-TIN-i-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust	0.00000000055 mg/kg
natural abundance (lautan)
natural abundance (Tubuh manusia)	0 %
natural abundance (Meteoroid)
natural abundance (Matahari)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Aktinium on ChemicalAid

ChEBI ID	33337
ChemSpider ID	22404
DSSTOX compound identifier	DTXCID10147879
DrugBank ID	12860
Encyclopedia of China ID (Second Edition)	190793
GEMET ID	68
ID BnF	121509422
ID Den Store Danske	actinium
ID Encyclopædia Universalis	actinium
ID Ensiklopedia Besar Rusia dalam talian	1807988
ID Ensiklopedia Britannica Dalam Talian	science/actinium
ID Freebase	/m/027sjs4
ID GND	4523163-1
ID Gran Enciclopèdia Catalana	0074647
ID J9U Perpustakaan Negara Israel	987007293853405171
ID KBpedia	Actinium
ID NKCR AUT	ph543052
ID Namuwiki	악티늄
ID PSH	5759
ID Perbendaharaan Kata Pendidikan Australia	scot/568
ID Store norske leksikon	actinium
ID Tesaurus BNCF	67637
ID Treccani	attinio
ID WordNet 3.1 Synset	14651833-n
ID bahan DSSTox	DTXSID10225388
ID kewibawaan Perpustakaan Kongres	sh85000706
ID pemerihal MeSH	D000186
ID topik Quora	Actinium
InChI	InChI=1S/Ac
InChIKey	QQINRWTZWGJFDB-UHFFFAOYSA-N
Maksud Tertakrif OmegaWiki	33
NALT ID	3219
Probes And Drugs ID	PD058409
PubChem CID	23965
Römpp online ID	RD-01-00659
UNII	NIK1K0956U
USGS Thesaurus ID	1385
nombor pendaftaran CAS	7440-34-8

Aktinium (Ac)

Properties

Isotopes of Actinium

205Ac

206Ac

207Ac

208Ac

209Ac

210Ac

211Ac

212Ac

213Ac

214Ac

215Ac

216Ac

217Ac

218Ac

219Ac

220Ac

221Ac

222Ac

223Ac

224Ac

225Ac

226Ac

227Ac

228Ac

229Ac

230Ac

231Ac

232Ac

233Ac

234Ac

235Ac

236Ac

237Ac

sejarah

sumber

Nuclear Screening Constants

²⁰⁵Ac

²⁰⁶Ac

²⁰⁷Ac

²⁰⁸Ac

²⁰⁹Ac

²¹⁰Ac

²¹¹Ac

²¹²Ac

²¹³Ac

²¹⁴Ac

²¹⁵Ac

²¹⁶Ac

²¹⁷Ac

²¹⁸Ac

²¹⁹Ac

²²⁰Ac

²²¹Ac

²²²Ac

²²³Ac

²²⁴Ac

²²⁵Ac

²²⁶Ac

²²⁷Ac

²²⁸Ac

²²⁹Ac

²³⁰Ac

²³¹Ac

²³²Ac

²³³Ac

²³⁴Ac

²³⁵Ac

²³⁶Ac

²³⁷Ac