Actini

Actini (Ac)

chemical element with the atomic number of 89
Atomic Number89
Atomic Weight227
Rhif màs205
Group3
Period7
Blockd
Proton89 p+
Niwtron116 n0
Electron89 e-
Animated Bohr model of Ac (Actini)

Nodwedd Ffisegol

Atomic Radius
195 pm
molar volume
22.54 cm³/mol
covalent radius
186 pm
Metallic Radius
ionic radius
112 pm
Crystal Radius
126 pm
Van der Waals radius
247 pm
density
Atomic Radii Of The Elements: Actini0102030405060708090100110120130140150160170180190200210220230240250pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
5.380226 eV/particle
ionization energy of Ac (Actini)
enthalpy of vaporization
292.9 kJ/mol
enthalpy of fusion
10.5 kJ/mol
standard enthalpy of formation
406 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 32, 18, 9, 2
Bohr model: Ac (Actini)
valence electron2
Lewis structure: Ac (Actini)
trefn yr electronnau[Rn] 6d1 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 6d1 7s2
Enhanced Bohr model of Ac (Actini)
Orbital Diagram of Ac (Actini)
Cyflwr ocsidiad2, 3
Electronegatifedd
1.1
Electrophilicity Index
0.8159546412794374 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
3,473.15 K
Melting Point
1,323.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearance
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
dargludedd trydanol
Gwrthedd
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureFace Centered Cubic (FCC)
lattice constant
5.31 Å
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryActinides, Actinides
CAS GroupIIIA
IUPAC GroupIIIB
Glawe Number33
Mendeleev Number14
Pettifor Number48
Geochemical ClassU/Th decay series
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
203 ± 12 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
880
Neutron Mass Absorption
0.078
quantum number2D3/2
space group225 (Fm_3m)

Isotopes of Actinium

Stable Isotopes0
Unstable Isotopes33
Natural Isotopes0

205Ac

Rhif màs205
neutron number116
relative atomic mass
205.015144152 ± 0.000063682 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
80 ± 60 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod2014
parity-

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

206Ac

Rhif màs206
neutron number117
relative atomic mass
206.014476477 ± 0.000069874 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
25 ± 7 ms
spin3
nuclear quadrupole moment
dyddiad darganfod1998
parity+

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

207Ac

Rhif màs207
neutron number118
relative atomic mass
207.011965967 ± 0.000060384 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
31 ± 8 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1994
parity-

decay modeintensity
α (α emission)100%

208Ac

Rhif màs208
neutron number119
relative atomic mass
208.011552251 ± 0.000069225 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
97 ± 15 ms
spin3
nuclear quadrupole moment
dyddiad darganfod1994
parity+

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

209Ac

Rhif màs209
neutron number120
relative atomic mass
209.009495375 ± 0.000059953 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
94 ± 10 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

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

210Ac

Rhif màs210
neutron number121
relative atomic mass
210.009408625 ± 0.000066782 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
350 ± 40 ms
spin7
nuclear quadrupole moment
dyddiad darganfod1968
parity+

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

211Ac

Rhif màs211
neutron number122
relative atomic mass
211.007668846 ± 0.000057706 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
213 ± 25 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

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

212Ac

Rhif màs212
neutron number123
relative atomic mass
212.007836442 ± 0.000023492 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
895 ± 28 ms
spin7
nuclear quadrupole moment
dyddiad darganfod1968
parity+

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

213Ac

Rhif màs213
neutron number124
relative atomic mass
213.006592665 ± 0.000012522 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
738 ± 16 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

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

214Ac

Rhif màs214
neutron number125
relative atomic mass
214.0069064 ± 0.000014547 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
8.2 ± 0.2 s
spin5
nuclear quadrupole moment
dyddiad darganfod1968
parity+

decay modeintensity
α (α emission)93%
β+ (β+ decay; β+ = ϵ + e+)7%

215Ac

Rhif màs215
neutron number126
relative atomic mass
215.006474061 ± 0.000013318 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
171 ± 10 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)0.09%

216Ac

Rhif màs216
neutron number127
relative atomic mass
216.008749101 ± 0.000009908 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
440 ± 16 us
spin1
nuclear quadrupole moment
dyddiad darganfod1967
parity-

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

217Ac

Rhif màs217
neutron number128
relative atomic mass
217.009342325 ± 0.000012048 Da
g-factor
0.85111111111111 ± 0.011111111111111
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
69 ± 4 ns
spin9/2
nuclear quadrupole moment
dyddiad darganfod1972
parity-

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

218Ac

Rhif màs218
neutron number129
relative atomic mass
218.01164886 ± 0.000061853 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1 ± 0.04 us
spin1
nuclear quadrupole moment
dyddiad darganfod1970
parity-

decay modeintensity
α (α emission)100%

219Ac

Rhif màs219
neutron number130
relative atomic mass
219.012420425 ± 0.000055263 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9.4 ± 1 us
spin9/2
nuclear quadrupole moment
dyddiad darganfod1970
parity-

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

220Ac

Rhif màs220
neutron number131
relative atomic mass
220.014754527 ± 0.000006579 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
26.36 ± 0.19 ms
spin3
nuclear quadrupole moment
dyddiad darganfod1970
parity-

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

221Ac

Rhif màs221
neutron number132
relative atomic mass
221.015599721 ± 0.000061086 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
52 ± 2 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
α (α emission)100%

222Ac

Rhif màs222
neutron number133
relative atomic mass
222.017844232 ± 0.000005044 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5 ± 0.5 s
spin1
nuclear quadrupole moment
dyddiad darganfod1949
parity-

decay modeintensity
α (α emission)99%
β+ (β+ decay; β+ = ϵ + e+)1%

223Ac

Rhif màs223
neutron number134
relative atomic mass
223.019135982 ± 0.000007457 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.1 ± 0.05 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1948
parity-

decay modeintensity
α (α emission)99%
ϵ (electron capture)

224Ac

Rhif màs224
neutron number135
relative atomic mass
224.021722249 ± 0.000004389 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.78 ± 0.16 h
spin0
nuclear quadrupole moment
0
dyddiad darganfod1948
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)90.5%
α (α emission)9.5%
β (β decay)

225Ac

Rhif màs225
neutron number136
relative atomic mass
225.023228601 ± 0.000005107 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9.919 ± 0.0021 d
spin3/2
nuclear quadrupole moment
dyddiad darganfod1947
parity-

decay modeintensity
α (α emission)100%
14C5.3%

226Ac

Rhif màs226
neutron number137
relative atomic mass
226.026096999 ± 0.000003327 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
29.37 ± 0.12 h
spin1
nuclear quadrupole moment
dyddiad darganfod1950
parity-

decay modeintensity
β (β decay)83%
ϵ (electron capture)17%
α (α emission)0.006%

227Ac

Rhif màs227
neutron number138
relative atomic mass
227.027750594 ± 0.000002068 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
21.772 ± 0.003 y
spin3/2
nuclear quadrupole moment
dyddiad darganfod1851
parity-

decay modeintensity
β (β decay)98.62%
α (α emission)1.38%

228Ac

Rhif màs228
neutron number139
relative atomic mass
228.031019685 ± 0.000002247 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.15 ± 0.02 h
spin3
nuclear quadrupole moment
dyddiad darganfod1908
parity+

decay modeintensity
β (β decay)100%

229Ac

Rhif màs229
neutron number140
relative atomic mass
229.032947 ± 0.000013 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
62.7 ± 0.5 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1952
parity+

decay modeintensity
β (β decay)100%

230Ac

Rhif màs230
neutron number141
relative atomic mass
230.036327 ± 0.000017 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
122 ± 3 s
spin1
nuclear quadrupole moment
dyddiad darganfod1973
parity+

decay modeintensity
β (β decay)100%
β SF (β-delayed fission)1.2%

231Ac

Rhif màs231
neutron number142
relative atomic mass
231.038393 ± 0.000014 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7.5 ± 0.1 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1973
parity+

decay modeintensity
β (β decay)100%

232Ac

Rhif màs232
neutron number143
relative atomic mass
232.042034 ± 0.000014 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.98 ± 0.08 m
spin1
nuclear quadrupole moment
dyddiad darganfod1986
parity+

decay modeintensity
β (β decay)100%

233Ac

Rhif màs233
neutron number144
relative atomic mass
233.044346 ± 0.000014 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
143 ± 10 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1983
parity+

decay modeintensity
β (β decay)100%

234Ac

Rhif màs234
neutron number145
relative atomic mass
234.048139 ± 0.000015 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
45 ± 2 s
spin1
nuclear quadrupole moment
dyddiad darganfod1986
parity+

decay modeintensity
β (β decay)100%

235Ac

Rhif màs235
neutron number146
relative atomic mass
235.05084 ± 0.000015 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
62 ± 4 s
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2006
parity+

decay modeintensity
β (β decay)100%

236Ac

Rhif màs236
neutron number147
relative atomic mass
236.054988 ± 0.000041 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.5 ± 3.6 m
spin3
nuclear quadrupole moment
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)100%

237Ac

Rhif màs237
neutron number148
relative atomic mass
237.057993 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod
parity+

decay modeintensity
β (β decay)
Actinium sample (31481701837)
Electron shell 089 Actinium

hanes

darganfyddwr neu ddyfeisiwrAndré Debierne
man darganfodFrance
dyddiad darganfod1899
geirdarddiadGreek: akis, aktinos (ray).
ynganiadak-TIN-i-em (Saesneg)

source

Abundance
Abundance in Earth's crust
0.00000000055 mg/kg
natural abundance (cefnfor)
natural abundance (corff dynol)
0 %
natural abundance (Awyrfaen)
natural abundance (Haul)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants