Astaitín (At)

chemical element with symbol At and atomic number 85

Atomic Number	85
Atomic Weight	210
Núicléónuimhir	191

Group	17
Period	6
Block	p

prótón	85 p⁺
neodrón	106 n⁰
leictreon	85 e^-

Physical Property

Ga Adamhach	247 pm
molar volume
covalent radius	147 pm 138 pm 138 pm 150 pm
Metallic Radius
ionic radius	62 pm
Crystal Radius	76 pm
Van der Waals radius	202 pm 251 pm 202 pm 475 pm
dlús	7 g/cm³

Chemical Property

fuinneamh

proton affinity
electron affinity	2.8 eV/particle
ionization energy	9.31751 eV/particle 17.88 eV/particle 26.58 eV/particle 39.65 eV/particle 50.39 eV/particle 72 eV/particle 85.1 eV/particle 130.1 eV/particle 149 eV/particle 169 eV/particle 192.1 eV/particle 212 eV/particle 236 eV/particle 263 eV/particle 287 eV/particle 311 eV/particle 335 eV/particle 452 eV/particle 481 eV/particle 510 eV/particle 540 eV/particle 600 eV/particle 630 eV/particle 720 eV/particle 750 eV/particle 790 eV/particle 860 eV/particle 920 eV/particle 990 eV/particle 1,050 eV/particle 1,120 eV/particle 1,180 eV/particle 1,250 eV/particle 1,320 eV/particle 1,380 eV/particle 1,450 eV/particle 1,510 eV/particle 1,590 eV/particle 1,650 eV/particle 1,948 eV/particle 2,007 eV/particle 2,071 eV/particle 2,139 eV/particle 2,203 eV/particle 2,266 eV/particle 2,373 eV/particle 2,439 eV/particle 2,510 eV/particle 2,576 eV/particle 2,841 eV/particle 2,905 eV/particle 2,977 eV/particle 3,042 eV/particle 3,312 eV/particle 3,388 eV/particle 3,573 eV/particle 3,649 eV/particle 5,980 eV/particle 6,122 eV/particle 6,279 eV/particle 6,445 eV/particle 6,604 eV/particle 6,759 eV/particle 7,068 eV/particle 7,230 eV/particle 7,410 eV/particle 7,570 eV/particle 8,030 eV/particle 8,180 eV/particle 8,330 eV/particle 8,480 eV/particle 9,330 eV/particle 9,500 eV/particle 9,830 eV/particle 9,990 eV/particle 21,210 eV/particle 21,600 eV/particle 22,030 eV/particle 22,420 eV/particle 25,580 eV/particle 26,080 eV/particle 26,730 eV/particle 27,139 eV/particle 107,923.4 eV/particle 109,886 eV/particle

enthalpy of vaporization
enthalpy of fusion
eantalpacht chaighdeánach an fhoirmithe
leictreon

electron shell	2, 8, 18, 32, 18, 7

Fiúsleictreon	7 ⓘ

cumraíocht leictreon	[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁵

Staid ocsaídiúcháine	-1, 1, 3, 5, 7
Leictridhiúltacht	14.1 eV/particle 0.19131 2.2
Electrophilicity Index	2.8161454412824063 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point
Melting Point	575.15 K
critical pressure
critical temperature
triple point
appearance
dath	Silver #ff1493 #754f45 #754f45
appearance	unknown, probably metallic
Comhéifeacht athraonta
thermodynamic material property
Thermal Conductivity
Forbairt theirmeach
molar heat capacity
Specific Heat Capacity
Cóimheas saintoilleadh teasa
electrical properties
type
electrical conductivity
Friotachas
Forsheoltacht
Maighnéadas
type
So-ghabhálacht mhaighnéadach (Mass)
So-ghabhálacht mhaighnéadach (Molar)
So-ghabhálacht mhaighnéadach (Volume)
magnetic ordering
Teocht Curie
Néel temperature
struchtúr
Crystal Structure	{ERROR}
lattice constant
Lattice Angles
airíonna meicniúla
Cruas
Modal toirte
modal fiartha
modal Young
Cóimheas Poisson
luas forleata fuaime
aicmiúchán
Category	Halogens, Halogens
CAS Group	VIIB
IUPAC Group	VIIA
Glawe Number	98
Mendeleev Number	110
Pettifor Number	96
Geochemical Class	U/Th decay series
Goldschmidt classification	synthetic

eile

Gas Basicity
polarizability	42 ± 4 a₀
C6 Dispersion Coefficient	351 a₀
allotrope
Crosghearradh
Neutron Mass Absorption
Uimhir chandamach	2P3/2
space group	()

Isotopes of Astatine

Stable Isotopes	0
Unstable Isotopes	39
Natural Isotopes	0

¹⁹¹At

Núicléónuimhir	191
neutron number	106
Mais Adamhach Choibhneasta	191.004148081 ± 0.000017287 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	2.1 ± 0.8 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2003
Paireacht	+

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

¹⁹²At

Núicléónuimhir	192
neutron number	107
Mais Adamhach Choibhneasta	192.003140912 ± 0.000029922 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	11.5 ± 0.6 ms
Guairne	3
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2006
Paireacht	+

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

¹⁹³At

Núicléónuimhir	193
neutron number	108
Mais Adamhach Choibhneasta	192.999927725 ± 0.000023222 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	29 ± 5 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2003
Paireacht	+

decay mode	intensity
α (α emission)	100%

¹⁹⁴At

Núicléónuimhir	194
neutron number	109
Mais Adamhach Choibhneasta	193.999230816 ± 0.00002523 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	286 ± 7 ms
Guairne	5
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2009
Paireacht	-

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

¹⁹⁵At

Núicléónuimhir	195
neutron number	110
Mais Adamhach Choibhneasta	194.99627448 ± 0.000010276 Da
G-fhachtóir	3.2 ± 0.1
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	290 ± 20 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1999
Paireacht	+

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

¹⁹⁶At

Núicléónuimhir	196
neutron number	111
Mais Adamhach Choibhneasta	195.995799034 ± 0.000032458 Da
G-fhachtóir	1.24 ± 0.046666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	377 ± 4 ms
Guairne	3
nuclear quadrupole moment	-0.6 ± 0.4
dáta fionnachtana nó tionscnaimh	1967
Paireacht	+

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

¹⁹⁷At

Núicléónuimhir	197
neutron number	112
Mais Adamhach Choibhneasta	196.993177353 ± 0.00000857 Da
G-fhachtóir	0.85111111111111 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	388.2 ± 5.6 ms
Guairne	9/2
nuclear quadrupole moment	-1.2 ± 0.6
dáta fionnachtana nó tionscnaimh	1967
Paireacht	-

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

¹⁹⁸At

Núicléónuimhir	198
neutron number	113
Mais Adamhach Choibhneasta	197.992797864 ± 0.000005265 Da
G-fhachtóir	1.34 ± 0.046666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	4.47 ± 0.05 s
Guairne	3
nuclear quadrupole moment	-0.6 ± 0.3
dáta fionnachtana nó tionscnaimh	1967
Paireacht	+

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

¹⁹⁹At

Núicléónuimhir	199
neutron number	114
Mais Adamhach Choibhneasta	198.990527715 ± 0.00000578 Da
G-fhachtóir	0.87555555555556 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7.02 ± 0.12 s
Guairne	9/2
nuclear quadrupole moment	-1 ± 0.5
dáta fionnachtana nó tionscnaimh	1967
Paireacht	-

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

²⁰⁰At

Núicléónuimhir	200
neutron number	115
Mais Adamhach Choibhneasta	199.990351099 ± 0.000026264 Da
G-fhachtóir	1.4266666666667 ± 0.05
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	43.2 ± 0.9 s
Guairne	3
nuclear quadrupole moment	-0.5 ± 0.5
dáta fionnachtana nó tionscnaimh	1963
Paireacht	+

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

²⁰¹At

Núicléónuimhir	201
neutron number	116
Mais Adamhach Choibhneasta	200.988417058 ± 0.000008786 Da
G-fhachtóir	0.89111111111111 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	85.2 ± 1.6 s
Guairne	9/2
nuclear quadrupole moment	-1 ± 0.5
dáta fionnachtana nó tionscnaimh	1963
Paireacht	-

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

²⁰²At

Núicléónuimhir	202
neutron number	117
Mais Adamhach Choibhneasta	201.988625686 ± 0.000029631 Da
G-fhachtóir	1.38 ± 0.053333333333333
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	184 ± 1 s
Guairne	3
nuclear quadrupole moment	-0.5 ± 0.3
dáta fionnachtana nó tionscnaimh	1961
Paireacht	+

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

²⁰³At

Núicléónuimhir	203
neutron number	118
Mais Adamhach Choibhneasta	202.986942904 ± 0.000011404 Da
G-fhachtóir	0.88888888888889 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7.4 ± 0.2 m
Guairne	9/2
nuclear quadrupole moment	-0.7 ± 0.4
dáta fionnachtana nó tionscnaimh	1951
Paireacht	-

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

²⁰⁴At

Núicléónuimhir	204
neutron number	119
Mais Adamhach Choibhneasta	203.987251393 ± 0.000024335 Da
G-fhachtóir	0.68857142857143 ± 0.025714285714286
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	9.12 ± 0.11 m
Guairne	7
nuclear quadrupole moment	-0.6 ± 0.3
dáta fionnachtana nó tionscnaimh	1961
Paireacht	+

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

²⁰⁵At

Núicléónuimhir	205
neutron number	120
Mais Adamhach Choibhneasta	204.986060546 ± 0.000012941 Da
G-fhachtóir	0.90888888888889 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	26.9 ± 0.8 m
Guairne	9/2
nuclear quadrupole moment	-0.6 ± 0.3
dáta fionnachtana nó tionscnaimh	1951
Paireacht	-

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

²⁰⁶At

Núicléónuimhir	206
neutron number	121
Mais Adamhach Choibhneasta	205.986645768 ± 0.000014523 Da
G-fhachtóir	0.72833333333333 ± 0.028333333333333
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	30.6 ± 0.8 m
Guairne	6
nuclear quadrupole moment	-0.4 ± 0.2
dáta fionnachtana nó tionscnaimh	1961
Paireacht

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

²⁰⁷At

Núicléónuimhir	207
neutron number	122
Mais Adamhach Choibhneasta	206.985799715 ± 0.000013318 Da
G-fhachtóir	0.91777777777778 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.81 ± 0.03 h
Guairne	9/2
nuclear quadrupole moment	-0.5 ± 0.3
dáta fionnachtana nó tionscnaimh	1951
Paireacht	-

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

²⁰⁸At

Núicléónuimhir	208
neutron number	123
Mais Adamhach Choibhneasta	207.986613011 ± 0.000009577 Da
G-fhachtóir	0.74333333333333 ± 0.03
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.63 ± 0.03 h
Guairne	6
nuclear quadrupole moment	-0.4 ± 0.3
dáta fionnachtana nó tionscnaimh	1950
Paireacht	+

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

²⁰⁹At

Núicléónuimhir	209
neutron number	124
Mais Adamhach Choibhneasta	208.986168701 ± 0.000005094 Da
G-fhachtóir	0.91555555555556 ± 0.015555555555556
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	5.42 ± 0.05 h
Guairne	9/2
nuclear quadrupole moment	-0.4 ± 0.2
dáta fionnachtana nó tionscnaimh	1951
Paireacht	-

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

²¹⁰At

Núicléónuimhir	210
neutron number	125
Mais Adamhach Choibhneasta	209.987147423 ± 0.000008261 Da
G-fhachtóir	0.944 ± 0.032
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	8.1 ± 0.4 h
Guairne	5
nuclear quadrupole moment	-0.4 ± 0.2
dáta fionnachtana nó tionscnaimh	1949
Paireacht

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

²¹¹At

Núicléónuimhir	211
neutron number	126
Mais Adamhach Choibhneasta	210.987496226 ± 0.000002929 Da
G-fhachtóir	0.92 ± 0.0088888888888889
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7.214 ± 0.007 h
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1940
Paireacht	-

decay mode	intensity
ϵ (electron capture)	58.2%
α (α emission)	41.8%

²¹²At

Núicléónuimhir	212
neutron number	127
Mais Adamhach Choibhneasta	211.990737301 ± 0.000002559 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	314 ± 3 ms
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1954
Paireacht	-

decay mode	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁻ (β⁻ decay)

²¹³At

Núicléónuimhir	213
neutron number	128
Mais Adamhach Choibhneasta	212.992936593 ± 0.000005258 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	125 ± 6 ns
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1968
Paireacht	-

decay mode	intensity
α (α emission)	100%

²¹⁴At

Núicléónuimhir	214
neutron number	129
Mais Adamhach Choibhneasta	213.996372331 ± 0.000004274 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	558 ± 10 ns
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1949
Paireacht	-

decay mode	intensity
α (α emission)	100%

²¹⁵At

Núicléónuimhir	215
neutron number	130
Mais Adamhach Choibhneasta	214.998651002 ± 0.000007116 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	37 ± 3 us
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1944
Paireacht	-

decay mode	intensity
α (α emission)	100%

²¹⁶At

Núicléónuimhir	216
neutron number	131
Mais Adamhach Choibhneasta	216.002422643 ± 0.000003837 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	300 ± 30 us
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1948
Paireacht	-

decay mode	intensity
α (α emission)	100%
β⁻ (β⁻ decay)
ϵ (electron capture)

²¹⁷At

Núicléónuimhir	217
neutron number	132
Mais Adamhach Choibhneasta	217.004717794 ± 0.000005368 Da
G-fhachtóir	0.84444444444444 ± 0.044444444444444
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	32.6 ± 0.3 ms
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1947
Paireacht	-

decay mode	intensity
α (α emission)	99.992%
β⁻ (β⁻ decay)	0.008%

²¹⁸At

Núicléónuimhir	218
neutron number	133
Mais Adamhach Choibhneasta	218.008695941 ± 0.000012349 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.28 ± 0.06 s
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1943
Paireacht	-

decay mode	intensity
α (α emission)	100%
β⁻ (β⁻ decay)

²¹⁹At

Núicléónuimhir	219
neutron number	134
Mais Adamhach Choibhneasta	219.011160587 ± 0.000003474 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	56 ± 3 s
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1953
Paireacht	-

decay mode	intensity
α (α emission)	93.6%
β⁻ (β⁻ decay)	6.4%

²²⁰At

Núicléónuimhir	220
neutron number	135
Mais Adamhach Choibhneasta	220.015433 ± 0.000015 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	3.71 ± 0.04 m
Guairne	3
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1989
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	92%
α (α emission)	8%

²²¹At

Núicléónuimhir	221
neutron number	136
Mais Adamhach Choibhneasta	221.018017 ± 0.000015 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	2.3 ± 0.2 m
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1989
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²²²At

Núicléónuimhir	222
neutron number	137
Mais Adamhach Choibhneasta	222.022494 ± 0.000017 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	54 ± 10 s
Guairne
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1989
Paireacht

decay mode	intensity
β⁻ (β⁻ decay)	100%

²²³At

Núicléónuimhir	223
neutron number	138
Mais Adamhach Choibhneasta	223.025151 ± 0.000015 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	50 ± 7 s
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1989
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
α (α emission)

²²⁴At

Núicléónuimhir	224
neutron number	139
Mais Adamhach Choibhneasta	224.029749 ± 0.000024 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	2.5 ± 1.5 m
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2010
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²²⁵At

Núicléónuimhir	225
neutron number	140
Mais Adamhach Choibhneasta	225.032528 ± 0.000322 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2010
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

²²⁶At

Núicléónuimhir	226
neutron number	141
Mais Adamhach Choibhneasta	226.037209 ± 0.000322 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2010
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

²²⁷At

Núicléónuimhir	227
neutron number	142
Mais Adamhach Choibhneasta	227.040183 ± 0.000322 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2010
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

²²⁸At

Núicléónuimhir	228
neutron number	143
Mais Adamhach Choibhneasta	228.04496 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	3
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2010
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

²²⁹At

Núicléónuimhir	229
neutron number	144
Mais Adamhach Choibhneasta	229.048191 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2010
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

stair

fionnachtaí nó aireagóir	D.R.Corson, K.R.MacKenzie, E.Segré
áit ar tháinig air/uirthi	United States
dáta fionnachtana nó tionscnaimh	1940
Sanasaíocht	Greek: astatos (unstable).
pronunciation	AS-teh-teen (Béarla)

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Abundance
Abundance in Earth's crust
natural abundance (aigéan)
natural abundance (corp an duine)	0 %
natural abundance (dreigeoideach)	0 %
natural abundance (An Ghrian)
Abundance in Universe	0 %

Nuclear Screening Constants

1	s	1.6446
2	p	4.5524
2	s	22.3324
3	d	13.4155
3	p	23.5024
3	s	24.6481
4	d	37.9504
4	f	37.7596
4	p	36.516
4	s	35.6644
5	d	58.661
5	p	53.96
5	s	52.0665
6	p	69.8368
6	s	67.7002

Astaitín on ChemicalAid

Astaitín (At)

Physical Property

Chemical Property

eile

Isotopes of Astatine

191At

192At

193At

194At

195At

196At

197At

198At

199At

200At

201At

202At

203At

204At

205At

206At

207At

208At

209At

210At

211At

212At

213At

214At

215At

216At

217At

218At

219At

220At

221At

222At

223At

224At

225At

226At

227At

228At

229At

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Nuclear Screening Constants

¹⁹¹At

¹⁹²At

¹⁹³At

¹⁹⁴At

¹⁹⁵At

¹⁹⁶At

¹⁹⁷At

¹⁹⁸At

¹⁹⁹At

²⁰⁰At

²⁰¹At

²⁰²At

²⁰³At

²⁰⁴At

²⁰⁵At

²⁰⁶At

²⁰⁷At

²⁰⁸At

²⁰⁹At

²¹⁰At

²¹¹At

²¹²At

²¹³At

²¹⁴At

²¹⁵At

²¹⁶At

²¹⁷At

²¹⁸At

²¹⁹At

²²⁰At

²²¹At

²²²At

²²³At

²²⁴At

²²⁵At

²²⁶At

²²⁷At

²²⁸At

²²⁹At