Аstat

Аstat (At)

chemical element with symbol At and atomic number 85
Atomic Number85
Atomic Weight210
Rhif màs191
Group17
Period6
Blockp
Proton85 p+
Niwtron106 n0
Electron85 e-
Animated Bohr model of At (Аstat)

Nodwedd Ffisegol

Atomic Radius
molar volume
covalent radius
147 pm
Metallic Radius
ionic radius
62 pm
Crystal Radius
76 pm
Van der Waals radius
202 pm
density

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
9.31751 eV/particle
ionization energy of At (Аstat)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Electron
plisgyn yr electron2, 8, 18, 32, 18, 7
Bohr model: At (Аstat)
valence electron7
Lewis structure: At (Аstat)
trefn yr electronnau[Xe] 4f14 5d10 6s2 6p5
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f14 5d10 6s2 6p5
Enhanced Bohr model of At (Аstat)
Orbital Diagram of At (Аstat)
Cyflwr ocsidiad-1, 1, 3, 5, 7
Electronegatifedd
2.2
Electrophilicity Index
2.8161454412824063 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
Melting Point
575.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearanceunknown, probably metallic
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 Structure ()
lattice constant
Lattice Angles
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryHalogens, Halogens
CAS GroupVIIB
IUPAC GroupVIIA
Glawe Number98
Mendeleev Number110
Pettifor Number96
Geochemical ClassU/Th decay series
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
42 ± 4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number2P3/2
space group ()

Isotopes of Astatine

Stable Isotopes0
Unstable Isotopes39
Natural Isotopes0

191At

Rhif màs191
neutron number106
relative atomic mass
191.004148081 ± 0.000017287 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.1 ± 0.8 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2003
parity+

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

192At

Rhif màs192
neutron number107
relative atomic mass
192.003140912 ± 0.000029922 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
11.5 ± 0.6 ms
spin3
nuclear quadrupole moment
dyddiad darganfod2006
parity+

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)
β+ SF (β+-delayed fission)0.51%

193At

Rhif màs193
neutron number108
relative atomic mass
192.999927725 ± 0.000023222 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
29 ± 5 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2003
parity+

decay modeintensity
α (α emission)100%

194At

Rhif màs194
neutron number109
relative atomic mass
193.999230816 ± 0.00002523 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
286 ± 7 ms
spin5
nuclear quadrupole moment
dyddiad darganfod2009
parity-

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)8.3%
β+ SF (β+-delayed fission)0.032%

195At

Rhif màs195
neutron number110
relative atomic mass
194.99627448 ± 0.000010276 Da
g-factor
3.2 ± 0.1
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
290 ± 20 ms
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1999
parity+

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

196At

Rhif màs196
neutron number111
relative atomic mass
195.995799034 ± 0.000032458 Da
g-factor
1.24 ± 0.046666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
377 ± 4 ms
spin3
nuclear quadrupole moment
-0.6 ± 0.4
dyddiad darganfod1967
parity+

decay modeintensity
α (α emission)97.5%
β+ (β+ decay; β+ = ϵ + e+)
β+ SF (β+-delayed fission)0.009%

197At

Rhif màs197
neutron number112
relative atomic mass
196.993177353 ± 0.00000857 Da
g-factor
0.85111111111111 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
388.2 ± 5.6 ms
spin9/2
nuclear quadrupole moment
-1.2 ± 0.6
dyddiad darganfod1967
parity-

decay modeintensity
α (α emission)96.1%
β+ (β+ decay; β+ = ϵ + e+)3.9%

198At

Rhif màs198
neutron number113
relative atomic mass
197.992797864 ± 0.000005265 Da
g-factor
1.34 ± 0.046666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.47 ± 0.05 s
spin3
nuclear quadrupole moment
-0.6 ± 0.3
dyddiad darganfod1967
parity+

decay modeintensity
α (α emission)97%
β+ (β+ decay; β+ = ϵ + e+)

199At

Rhif màs199
neutron number114
relative atomic mass
198.990527715 ± 0.00000578 Da
g-factor
0.87555555555556 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7.02 ± 0.12 s
spin9/2
nuclear quadrupole moment
-1 ± 0.5
dyddiad darganfod1967
parity-

decay modeintensity
α (α emission)89%
β+ (β+ decay; β+ = ϵ + e+)

200At

Rhif màs200
neutron number115
relative atomic mass
199.990351099 ± 0.000026264 Da
g-factor
1.4266666666667 ± 0.05
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
43.2 ± 0.9 s
spin3
nuclear quadrupole moment
-0.5 ± 0.5
dyddiad darganfod1963
parity+

decay modeintensity
α (α emission)52%
β+ (β+ decay; β+ = ϵ + e+)48%

201At

Rhif màs201
neutron number116
relative atomic mass
200.988417058 ± 0.000008786 Da
g-factor
0.89111111111111 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
85.2 ± 1.6 s
spin9/2
nuclear quadrupole moment
-1 ± 0.5
dyddiad darganfod1963
parity-

decay modeintensity
α (α emission)71%
β+ (β+ decay; β+ = ϵ + e+)29%

202At

Rhif màs202
neutron number117
relative atomic mass
201.988625686 ± 0.000029631 Da
g-factor
1.38 ± 0.053333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
184 ± 1 s
spin3
nuclear quadrupole moment
-0.5 ± 0.3
dyddiad darganfod1961
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)88%
α (α emission)12%

203At

Rhif màs203
neutron number118
relative atomic mass
202.986942904 ± 0.000011404 Da
g-factor
0.88888888888889 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7.4 ± 0.2 m
spin9/2
nuclear quadrupole moment
-0.7 ± 0.4
dyddiad darganfod1951
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)69%
α (α emission)31%

204At

Rhif màs204
neutron number119
relative atomic mass
203.987251393 ± 0.000024335 Da
g-factor
0.68857142857143 ± 0.025714285714286
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9.12 ± 0.11 m
spin7
nuclear quadrupole moment
-0.6 ± 0.3
dyddiad darganfod1961
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)96.2%
α (α emission)3.8%

205At

Rhif màs205
neutron number120
relative atomic mass
204.986060546 ± 0.000012941 Da
g-factor
0.90888888888889 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
26.9 ± 0.8 m
spin9/2
nuclear quadrupole moment
-0.6 ± 0.3
dyddiad darganfod1951
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)90%
α (α emission)10%

206At

Rhif màs206
neutron number121
relative atomic mass
205.986645768 ± 0.000014523 Da
g-factor
0.72833333333333 ± 0.028333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
30.6 ± 0.8 m
spin6
nuclear quadrupole moment
-0.4 ± 0.2
dyddiad darganfod1961
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.1%
α (α emission)0.9%

207At

Rhif màs207
neutron number122
relative atomic mass
206.985799715 ± 0.000013318 Da
g-factor
0.91777777777778 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.81 ± 0.03 h
spin9/2
nuclear quadrupole moment
-0.5 ± 0.3
dyddiad darganfod1951
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)90%
α (α emission)10%

208At

Rhif màs208
neutron number123
relative atomic mass
207.986613011 ± 0.000009577 Da
g-factor
0.74333333333333 ± 0.03
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.63 ± 0.03 h
spin6
nuclear quadrupole moment
-0.4 ± 0.3
dyddiad darganfod1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.45%
α (α emission)0.55%

209At

Rhif màs209
neutron number124
relative atomic mass
208.986168701 ± 0.000005094 Da
g-factor
0.91555555555556 ± 0.015555555555556
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.42 ± 0.05 h
spin9/2
nuclear quadrupole moment
-0.4 ± 0.2
dyddiad darganfod1951
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)96.1%
α (α emission)3.9%

210At

Rhif màs210
neutron number125
relative atomic mass
209.987147423 ± 0.000008261 Da
g-factor
0.944 ± 0.032
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
8.1 ± 0.4 h
spin5
nuclear quadrupole moment
-0.4 ± 0.2
dyddiad darganfod1949
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.825%
α (α emission)0.175%

211At

Rhif màs211
neutron number126
relative atomic mass
210.987496226 ± 0.000002929 Da
g-factor
0.92 ± 0.0088888888888889
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7.214 ± 0.007 h
spin9/2
nuclear quadrupole moment
dyddiad darganfod1940
parity-

decay modeintensity
ϵ (electron capture)58.2%
α (α emission)41.8%

212At

Rhif màs212
neutron number127
relative atomic mass
211.990737301 ± 0.000002559 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
314 ± 3 ms
spin1
nuclear quadrupole moment
dyddiad darganfod1954
parity-

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

213At

Rhif màs213
neutron number128
relative atomic mass
212.992936593 ± 0.000005258 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
125 ± 6 ns
spin9/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
α (α emission)100%

214At

Rhif màs214
neutron number129
relative atomic mass
213.996372331 ± 0.000004274 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
558 ± 10 ns
spin1
nuclear quadrupole moment
dyddiad darganfod1949
parity-

decay modeintensity
α (α emission)100%

215At

Rhif màs215
neutron number130
relative atomic mass
214.998651002 ± 0.000007116 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
37 ± 3 us
spin9/2
nuclear quadrupole moment
dyddiad darganfod1944
parity-

decay modeintensity
α (α emission)100%

216At

Rhif màs216
neutron number131
relative atomic mass
216.002422643 ± 0.000003837 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
300 ± 30 us
spin1
nuclear quadrupole moment
dyddiad darganfod1948
parity-

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

217At

Rhif màs217
neutron number132
relative atomic mass
217.004717794 ± 0.000005368 Da
g-factor
0.84444444444444 ± 0.044444444444444
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
32.6 ± 0.3 ms
spin9/2
nuclear quadrupole moment
dyddiad darganfod1947
parity-

decay modeintensity
α (α emission)99.992%
β (β decay)0.008%

218At

Rhif màs218
neutron number133
relative atomic mass
218.008695941 ± 0.000012349 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.28 ± 0.06 s
spin2
nuclear quadrupole moment
dyddiad darganfod1943
parity-

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

219At

Rhif màs219
neutron number134
relative atomic mass
219.011160587 ± 0.000003474 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
56 ± 3 s
spin9/2
nuclear quadrupole moment
dyddiad darganfod1953
parity-

decay modeintensity
α (α emission)93.6%
β (β decay)6.4%

220At

Rhif màs220
neutron number135
relative atomic mass
220.015433 ± 0.000015 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.71 ± 0.04 m
spin3
nuclear quadrupole moment
dyddiad darganfod1989
parity-

decay modeintensity
β (β decay)92%
α (α emission)8%

221At

Rhif màs221
neutron number136
relative atomic mass
221.018017 ± 0.000015 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.3 ± 0.2 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1989
parity-

decay modeintensity
β (β decay)100%

222At

Rhif màs222
neutron number137
relative atomic mass
222.022494 ± 0.000017 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
54 ± 10 s
spin
nuclear quadrupole moment
dyddiad darganfod1989
parity

decay modeintensity
β (β decay)100%

223At

Rhif màs223
neutron number138
relative atomic mass
223.025151 ± 0.000015 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
50 ± 7 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1989
parity-

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

224At

Rhif màs224
neutron number139
relative atomic mass
224.029749 ± 0.000024 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.5 ± 1.5 m
spin2
nuclear quadrupole moment
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)100%

225At

Rhif màs225
neutron number140
relative atomic mass
225.032528 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

226At

Rhif màs226
neutron number141
relative atomic mass
226.037209 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin2
nuclear quadrupole moment
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

227At

Rhif màs227
neutron number142
relative atomic mass
227.040183 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

228At

Rhif màs228
neutron number143
relative atomic mass
228.04496 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3
nuclear quadrupole moment
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

229At

Rhif màs229
neutron number144
relative atomic mass
229.048191 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod2010
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Electron shell 085 Astatine

hanes

darganfyddwr neu ddyfeisiwrD.R.Corson, K.R.MacKenzie, E.Segré
man darganfodUnited States
dyddiad darganfod1940
geirdarddiadGreek: astatos (unstable).
ynganiadAS-teh-teen (Saesneg)

source

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

Nuclear Screening Constants

1s1.6446
2p4.5524
2s22.3324
3d13.4155
3p23.5024
3s24.6481
4d37.9504
4f37.7596
4p36.516
4s35.6644
5d58.661
5p53.96
5s52.0665
6p69.8368
6s67.7002