Astat

Astat (At)

chemical element with symbol At and atomic number 85
Atomic Number85
Atomic Weight210
Niver mas191
Group17
Period6
Blockp
Proton85 p+
Neutron106 n0
Elektron85 e-
Animated Bohr model of At (Astat)

Physical Property

Atomic Radius
molar volume
Covalent Radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
density

Chemical Property

energiezh
proton affinity
electron affinity
ionization energy
ionization energy of At (Astat)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Elektron
electron shell2, 8, 18, 32, 18, 7
Bohr model: At (Astat)
valence electron7
Lewis structure: At (Astat)
electron configuration[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 (Astat)
Orbital Diagram of At (Astat)
oxidation number-1, 1, 3, 5, 7
electronegativity
2.2
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
Poent tric'hement
appearance
liv
Silver
appearanceunknown, probably metallic
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
Gwarellegezh
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
framm
Crystal Structure{ERROR}
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
rummatadur
CategoryHalogens, Halogens
CAS GroupVIIB
IUPAC GroupVIIA
Glawe Number98
Mendeleev Number110
Pettifor Number96
Geochemical ClassU/Th decay series
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
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

Niver mas191
niver a neutron106
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2,1 ± 0,8 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2003
parity+

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

192At

Niver mas192
niver a neutron107
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
11,5 ± 0,6 ms
spin3
nuclear quadrupole moment
time of discovery or invention2006
parity+

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

193At

Niver mas193
niver a neutron108
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
29 ± 5 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2003
parity+

decay modeintensity
α (α emission)100%

194At

Niver mas194
niver a neutron109
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
286 ± 7 ms
spin5
nuclear quadrupole moment
time of discovery or invention2009
parity-

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

195At

Niver mas195
niver a neutron110
Relative Atomic Mass
g-factor
3,2 ± 0,1
natural abundance
radioactivity☢️ radioactive element
half-life
290 ± 20 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1999
parity+

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

196At

Niver mas196
niver a neutron111
Relative Atomic Mass
g-factor
1,24 ± 0,046666666666667
natural abundance
radioactivity☢️ radioactive element
half-life
377 ± 4 ms
spin3
nuclear quadrupole moment
-0,6 ± 0,4
time of discovery or invention1967
parity+

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

197At

Niver mas197
niver a neutron112
Relative Atomic Mass
g-factor
0,85111111111111 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
388,2 ± 5,6 ms
spin9/2
nuclear quadrupole moment
-1,2 ± 0,6
time of discovery or invention1967
parity-

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

198At

Niver mas198
niver a neutron113
Relative Atomic Mass
g-factor
1,34 ± 0,046666666666667
natural abundance
radioactivity☢️ radioactive element
half-life
4,47 ± 0,05 s
spin3
nuclear quadrupole moment
-0,6 ± 0,3
time of discovery or invention1967
parity+

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

199At

Niver mas199
niver a neutron114
Relative Atomic Mass
g-factor
0,87555555555556 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
7,02 ± 0,12 s
spin9/2
nuclear quadrupole moment
-1 ± 0,5
time of discovery or invention1967
parity-

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

200At

Niver mas200
niver a neutron115
Relative Atomic Mass
g-factor
1,4266666666667 ± 0,05
natural abundance
radioactivity☢️ radioactive element
half-life
43,2 ± 0,9 s
spin3
nuclear quadrupole moment
-0,5 ± 0,5
time of discovery or invention1963
parity+

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

201At

Niver mas201
niver a neutron116
Relative Atomic Mass
g-factor
0,89111111111111 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
85,2 ± 1,6 s
spin9/2
nuclear quadrupole moment
-1 ± 0,5
time of discovery or invention1963
parity-

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

202At

Niver mas202
niver a neutron117
Relative Atomic Mass
g-factor
1,38 ± 0,053333333333333
natural abundance
radioactivity☢️ radioactive element
half-life
184 ± 1 s
spin3
nuclear quadrupole moment
-0,5 ± 0,3
time of discovery or invention1961
parity+

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

203At

Niver mas203
niver a neutron118
Relative Atomic Mass
g-factor
0,88888888888889 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
7,4 ± 0,2 m
spin9/2
nuclear quadrupole moment
-0,7 ± 0,4
time of discovery or invention1951
parity-

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

204At

Niver mas204
niver a neutron119
Relative Atomic Mass
g-factor
0,68857142857143 ± 0,025714285714286
natural abundance
radioactivity☢️ radioactive element
half-life
9,12 ± 0,11 m
spin7
nuclear quadrupole moment
-0,6 ± 0,3
time of discovery or invention1961
parity+

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

205At

Niver mas205
niver a neutron120
Relative Atomic Mass
g-factor
0,90888888888889 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
26,9 ± 0,8 m
spin9/2
nuclear quadrupole moment
-0,6 ± 0,3
time of discovery or invention1951
parity-

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

206At

Niver mas206
niver a neutron121
Relative Atomic Mass
g-factor
0,72833333333333 ± 0,028333333333333
natural abundance
radioactivity☢️ radioactive element
half-life
30,6 ± 0,8 m
spin6
nuclear quadrupole moment
-0,4 ± 0,2
time of discovery or invention1961
parity

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

207At

Niver mas207
niver a neutron122
Relative Atomic Mass
g-factor
0,91777777777778 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
1,81 ± 0,03 h
spin9/2
nuclear quadrupole moment
-0,5 ± 0,3
time of discovery or invention1951
parity-

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

208At

Niver mas208
niver a neutron123
Relative Atomic Mass
g-factor
0,74333333333333 ± 0,03
natural abundance
radioactivity☢️ radioactive element
half-life
1,63 ± 0,03 h
spin6
nuclear quadrupole moment
-0,4 ± 0,3
time of discovery or invention1950
parity+

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

209At

Niver mas209
niver a neutron124
Relative Atomic Mass
g-factor
0,91555555555556 ± 0,015555555555556
natural abundance
radioactivity☢️ radioactive element
half-life
5,42 ± 0,05 h
spin9/2
nuclear quadrupole moment
-0,4 ± 0,2
time of discovery or invention1951
parity-

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

210At

Niver mas210
niver a neutron125
Relative Atomic Mass
g-factor
0,944 ± 0,032
natural abundance
radioactivity☢️ radioactive element
half-life
8,1 ± 0,4 h
spin5
nuclear quadrupole moment
-0,4 ± 0,2
time of discovery or invention1949
parity

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

211At

Niver mas211
niver a neutron126
Relative Atomic Mass
g-factor
0,92 ± 0,0088888888888889
natural abundance
radioactivity☢️ radioactive element
half-life
7,214 ± 0,007 h
spin9/2
nuclear quadrupole moment
time of discovery or invention1940
parity-

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

212At

Niver mas212
niver a neutron127
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
314 ± 3 ms
spin1
nuclear quadrupole moment
time of discovery or invention1954
parity-

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

213At

Niver mas213
niver a neutron128
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
125 ± 6 ns
spin9/2
nuclear quadrupole moment
time of discovery or invention1968
parity-

decay modeintensity
α (α emission)100%

214At

Niver mas214
niver a neutron129
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
558 ± 10 ns
spin1
nuclear quadrupole moment
time of discovery or invention1949
parity-

decay modeintensity
α (α emission)100%

215At

Niver mas215
niver a neutron130
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
37 ± 3 us
spin9/2
nuclear quadrupole moment
time of discovery or invention1944
parity-

decay modeintensity
α (α emission)100%

216At

Niver mas216
niver a neutron131
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
300 ± 30 us
spin1
nuclear quadrupole moment
time of discovery or invention1948
parity-

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

217At

Niver mas217
niver a neutron132
Relative Atomic Mass
g-factor
0,84444444444444 ± 0,044444444444444
natural abundance
radioactivity☢️ radioactive element
half-life
32,6 ± 0,3 ms
spin9/2
nuclear quadrupole moment
time of discovery or invention1947
parity-

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

218At

Niver mas218
niver a neutron133
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,28 ± 0,06 s
spin2
nuclear quadrupole moment
time of discovery or invention1943
parity-

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

219At

Niver mas219
niver a neutron134
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
56 ± 3 s
spin9/2
nuclear quadrupole moment
time of discovery or invention1953
parity-

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

220At

Niver mas220
niver a neutron135
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3,71 ± 0,04 m
spin3
nuclear quadrupole moment
time of discovery or invention1989
parity-

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

221At

Niver mas221
niver a neutron136
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2,3 ± 0,2 m
spin3/2
nuclear quadrupole moment
time of discovery or invention1989
parity-

decay modeintensity
β (β decay)100%

222At

Niver mas222
niver a neutron137
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
54 ± 10 s
spin
nuclear quadrupole moment
time of discovery or invention1989
parity

decay modeintensity
β (β decay)100%

223At

Niver mas223
niver a neutron138
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
50 ± 7 s
spin3/2
nuclear quadrupole moment
time of discovery or invention1989
parity-

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

224At

Niver mas224
niver a neutron139
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2,5 ± 1,5 m
spin2
nuclear quadrupole moment
time of discovery or invention2010
parity+

decay modeintensity
β (β decay)100%

225At

Niver mas225
niver a neutron140
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2010
parity+

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

226At

Niver mas226
niver a neutron141
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin2
nuclear quadrupole moment
time of discovery or invention2010
parity+

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

227At

Niver mas227
niver a neutron142
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2010
parity+

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

228At

Niver mas228
niver a neutron143
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3
nuclear quadrupole moment
time of discovery or invention2010
parity+

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

229At

Niver mas229
niver a neutron144
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2010
parity+

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

istor

dizoloer pe ijinerD.R.Corson, K.R.MacKenzie, E.Segré
location of discoveryUnited States
time of discovery or invention1940
EtimologiezhGreek: astatos (unstable).
pronunciationAS-teh-teen (saozneg)

mammenn

Abundance
Abundance in Earth's crust
natural abundance (meurvor)
natural abundance (human body)
0 %
natural abundance (meteoroid)
0 %
natural abundance (Heol)
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