Astatine (At)

Radioactive halogen element. Occurs naturally from uranium and thorium decay. At least 20 known isotopes. At-210, the most stable, has a half-life of 8.3 hours. Synthesized by nuclear bombardment in 1940 by D.R. Corson, K.R. MacKenzie and E. Segre at the University of California.

Atomic Number	85
Atomic Weight	210
Mass Number	191

Group	17
Period	6
Block	p

Protons	85 p⁺
Neutrons	106 n⁰
Electrons	85 e^-

Properties

Energy
Atomic Radius	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
Density	7 g/cm³
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

Heat of Vaporization
Heat of Fusion
Heat of Formation
Electrons
Electron Shells	2, 8, 18, 32, 18, 7

Valence Electrons	7

Electron Configuration	[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

Oxidation States	-1, 1, 3, 5, 7
Electronegativity	14.1 eV/particle 0.19131 2.2
Electrophilicity	2.8161454412824063 eV/particle
Phases
Phase	Solid
Gas Phase
Boiling Point
Melting Point	575.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Color	Silver #ff1493 #754f45 #754f45
Appearance	unknown, probably metallic
Refractive Index
Thermodynamic Properties
Thermal Conductivity
Thermal Expansion
Molar Heat Capacity
Specific Heat Capacity
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type
Electrical Conductivity
Electrical Resistivity
Superconducting Point
Magnetism
Type
Magnetic Susceptibility (Mass)
Magnetic Susceptibility (Molar)
Magnetic Susceptibility (Volume)
Magnetic Ordering
Curie Point
Neel Point
Structure
Crystal Structure	()
Lattice Constant
Lattice Angles
Mechanical Properties
Hardness
Bulk Modulus
Shear Modulus
Young Modulus
Poisson Ratio
Speed of Sound
Classification
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 Class	synthetic
Other
Gas Basicity
Dipole Polarizability	42 ± 4 a₀
C6 Dispersion Coefficient	351 a₀
Allotropes
Neutron Cross Section
Neutron Mass Absorption
Quantum Numbers	2P3/2
Space Group	()

Isotopes of Astatine

Stable Isotopes	0
Unstable Isotopes	39
Radioactive Isotopes	39

¹⁹¹At

Abundance	Radioactive ☢️
Relative Atomic Mass	191.004148081 ± 0.000017287 Da
Mass Number	191
G-Factor
Half Life	2.1 ± 0.8 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	2003
Parity	+

¹⁹¹At Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

¹⁹²At

Abundance	Radioactive ☢️
Relative Atomic Mass	192.003140912 ± 0.000029922 Da
Mass Number	192
G-Factor
Half Life	11.5 ± 0.6 ms
Spin	3
Quadrupole Moment
Discovery Year	2006
Parity	+

¹⁹²At Decay Modes

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

¹⁹³At

Abundance	Radioactive ☢️
Relative Atomic Mass	192.999927725 ± 0.000023222 Da
Mass Number	193
G-Factor
Half Life	29 ± 5 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	2003
Parity	+

¹⁹³At Decay Modes

Decay Mode	Intensity
α (α emission)	100%

¹⁹⁴At

Abundance	Radioactive ☢️
Relative Atomic Mass	193.999230816 ± 0.00002523 Da
Mass Number	194
G-Factor
Half Life	286 ± 7 ms
Spin	5
Quadrupole Moment
Discovery Year	2009
Parity	-

¹⁹⁴At Decay Modes

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

¹⁹⁵At

Abundance	Radioactive ☢️
Relative Atomic Mass	194.99627448 ± 0.000010276 Da
Mass Number	195
G-Factor	3.2 ± 0.1
Half Life	290 ± 20 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	1999
Parity	+

¹⁹⁵At Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

¹⁹⁶At

Abundance	Radioactive ☢️
Relative Atomic Mass	195.995799034 ± 0.000032458 Da
Mass Number	196
G-Factor	1.24 ± 0.046666666666667
Half Life	377 ± 4 ms
Spin	3
Quadrupole Moment	-0.6 ± 0.4
Discovery Year	1967
Parity	+

¹⁹⁶At Decay Modes

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

¹⁹⁷At

Abundance	Radioactive ☢️
Relative Atomic Mass	196.993177353 ± 0.00000857 Da
Mass Number	197
G-Factor	0.85111111111111 ± 0.015555555555556
Half Life	388.2 ± 5.6 ms
Spin	9/2
Quadrupole Moment	-1.2 ± 0.6
Discovery Year	1967
Parity	-

¹⁹⁷At Decay Modes

Decay Mode	Intensity
α (α emission)	96.1%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	3.9%

¹⁹⁸At

Abundance	Radioactive ☢️
Relative Atomic Mass	197.992797864 ± 0.000005265 Da
Mass Number	198
G-Factor	1.34 ± 0.046666666666667
Half Life	4.47 ± 0.05 s
Spin	3
Quadrupole Moment	-0.6 ± 0.3
Discovery Year	1967
Parity	+

¹⁹⁸At Decay Modes

Decay Mode	Intensity
α (α emission)	97%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

¹⁹⁹At

Abundance	Radioactive ☢️
Relative Atomic Mass	198.990527715 ± 0.00000578 Da
Mass Number	199
G-Factor	0.87555555555556 ± 0.015555555555556
Half Life	7.02 ± 0.12 s
Spin	9/2
Quadrupole Moment	-1 ± 0.5
Discovery Year	1967
Parity	-

¹⁹⁹At Decay Modes

Decay Mode	Intensity
α (α emission)	89%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

²⁰⁰At

Abundance	Radioactive ☢️
Relative Atomic Mass	199.990351099 ± 0.000026264 Da
Mass Number	200
G-Factor	1.4266666666667 ± 0.05
Half Life	43.2 ± 0.9 s
Spin	3
Quadrupole Moment	-0.5 ± 0.5
Discovery Year	1963
Parity	+

²⁰⁰At Decay Modes

Decay Mode	Intensity
α (α emission)	52%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	48%

²⁰¹At

Abundance	Radioactive ☢️
Relative Atomic Mass	200.988417058 ± 0.000008786 Da
Mass Number	201
G-Factor	0.89111111111111 ± 0.015555555555556
Half Life	85.2 ± 1.6 s
Spin	9/2
Quadrupole Moment	-1 ± 0.5
Discovery Year	1963
Parity	-

²⁰¹At Decay Modes

Decay Mode	Intensity
α (α emission)	71%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	29%

²⁰²At

Abundance	Radioactive ☢️
Relative Atomic Mass	201.988625686 ± 0.000029631 Da
Mass Number	202
G-Factor	1.38 ± 0.053333333333333
Half Life	184 ± 1 s
Spin	3
Quadrupole Moment	-0.5 ± 0.3
Discovery Year	1961
Parity	+

²⁰²At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	88%
α (α emission)	12%

²⁰³At

Abundance	Radioactive ☢️
Relative Atomic Mass	202.986942904 ± 0.000011404 Da
Mass Number	203
G-Factor	0.88888888888889 ± 0.015555555555556
Half Life	7.4 ± 0.2 m
Spin	9/2
Quadrupole Moment	-0.7 ± 0.4
Discovery Year	1951
Parity	-

²⁰³At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	69%
α (α emission)	31%

²⁰⁴At

Abundance	Radioactive ☢️
Relative Atomic Mass	203.987251393 ± 0.000024335 Da
Mass Number	204
G-Factor	0.68857142857143 ± 0.025714285714286
Half Life	9.12 ± 0.11 m
Spin	7
Quadrupole Moment	-0.6 ± 0.3
Discovery Year	1961
Parity	+

²⁰⁴At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	96.2%
α (α emission)	3.8%

²⁰⁵At

Abundance	Radioactive ☢️
Relative Atomic Mass	204.986060546 ± 0.000012941 Da
Mass Number	205
G-Factor	0.90888888888889 ± 0.015555555555556
Half Life	26.9 ± 0.8 m
Spin	9/2
Quadrupole Moment	-0.6 ± 0.3
Discovery Year	1951
Parity	-

²⁰⁵At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	90%
α (α emission)	10%

²⁰⁶At

Abundance	Radioactive ☢️
Relative Atomic Mass	205.986645768 ± 0.000014523 Da
Mass Number	206
G-Factor	0.72833333333333 ± 0.028333333333333
Half Life	30.6 ± 0.8 m
Spin	6
Quadrupole Moment	-0.4 ± 0.2
Discovery Year	1961
Parity

²⁰⁶At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.1%
α (α emission)	0.9%

²⁰⁷At

Abundance	Radioactive ☢️
Relative Atomic Mass	206.985799715 ± 0.000013318 Da
Mass Number	207
G-Factor	0.91777777777778 ± 0.015555555555556
Half Life	1.81 ± 0.03 h
Spin	9/2
Quadrupole Moment	-0.5 ± 0.3
Discovery Year	1951
Parity	-

²⁰⁷At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	90%
α (α emission)	10%

²⁰⁸At

Abundance	Radioactive ☢️
Relative Atomic Mass	207.986613011 ± 0.000009577 Da
Mass Number	208
G-Factor	0.74333333333333 ± 0.03
Half Life	1.63 ± 0.03 h
Spin	6
Quadrupole Moment	-0.4 ± 0.3
Discovery Year	1950
Parity	+

²⁰⁸At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.45%
α (α emission)	0.55%

²⁰⁹At

Abundance	Radioactive ☢️
Relative Atomic Mass	208.986168701 ± 0.000005094 Da
Mass Number	209
G-Factor	0.91555555555556 ± 0.015555555555556
Half Life	5.42 ± 0.05 h
Spin	9/2
Quadrupole Moment	-0.4 ± 0.2
Discovery Year	1951
Parity	-

²⁰⁹At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	96.1%
α (α emission)	3.9%

²¹⁰At

Abundance	Radioactive ☢️
Relative Atomic Mass	209.987147423 ± 0.000008261 Da
Mass Number	210
G-Factor	0.944 ± 0.032
Half Life	8.1 ± 0.4 h
Spin	5
Quadrupole Moment	-0.4 ± 0.2
Discovery Year	1949
Parity

²¹⁰At Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.825%
α (α emission)	0.175%

²¹¹At

Abundance	Radioactive ☢️
Relative Atomic Mass	210.987496226 ± 0.000002929 Da
Mass Number	211
G-Factor	0.92 ± 0.0088888888888889
Half Life	7.214 ± 0.007 h
Spin	9/2
Quadrupole Moment
Discovery Year	1940
Parity	-

²¹¹At Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	58.2%
α (α emission)	41.8%

²¹²At

Abundance	Radioactive ☢️
Relative Atomic Mass	211.990737301 ± 0.000002559 Da
Mass Number	212
G-Factor
Half Life	314 ± 3 ms
Spin	1
Quadrupole Moment
Discovery Year	1954
Parity	-

²¹²At Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
β⁻ (β⁻ decay)	%

²¹³At

Abundance	Radioactive ☢️
Relative Atomic Mass	212.992936593 ± 0.000005258 Da
Mass Number	213
G-Factor
Half Life	125 ± 6 ns
Spin	9/2
Quadrupole Moment
Discovery Year	1968
Parity	-

²¹³At Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁴At

Abundance	Radioactive ☢️
Relative Atomic Mass	213.996372331 ± 0.000004274 Da
Mass Number	214
G-Factor
Half Life	558 ± 10 ns
Spin	1
Quadrupole Moment
Discovery Year	1949
Parity	-

²¹⁴At Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁵At

Abundance	Radioactive ☢️
Relative Atomic Mass	214.998651002 ± 0.000007116 Da
Mass Number	215
G-Factor
Half Life	37 ± 3 us
Spin	9/2
Quadrupole Moment
Discovery Year	1944
Parity	-

²¹⁵At Decay Modes

Decay Mode	Intensity
α (α emission)	100%

²¹⁶At

Abundance	Radioactive ☢️
Relative Atomic Mass	216.002422643 ± 0.000003837 Da
Mass Number	216
G-Factor
Half Life	300 ± 30 us
Spin	1
Quadrupole Moment
Discovery Year	1948
Parity	-

²¹⁶At Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁻ (β⁻ decay)	%
ϵ (electron capture)	%

²¹⁷At

Abundance	Radioactive ☢️
Relative Atomic Mass	217.004717794 ± 0.000005368 Da
Mass Number	217
G-Factor	0.84444444444444 ± 0.044444444444444
Half Life	32.6 ± 0.3 ms
Spin	9/2
Quadrupole Moment
Discovery Year	1947
Parity	-

²¹⁷At Decay Modes

Decay Mode	Intensity
α (α emission)	99.992%
β⁻ (β⁻ decay)	0.008%

²¹⁸At

Abundance	Radioactive ☢️
Relative Atomic Mass	218.008695941 ± 0.000012349 Da
Mass Number	218
G-Factor
Half Life	1.28 ± 0.06 s
Spin	2
Quadrupole Moment
Discovery Year	1943
Parity	-

²¹⁸At Decay Modes

Decay Mode	Intensity
α (α emission)	100%
β⁻ (β⁻ decay)	%

²¹⁹At

Abundance	Radioactive ☢️
Relative Atomic Mass	219.011160587 ± 0.000003474 Da
Mass Number	219
G-Factor
Half Life	56 ± 3 s
Spin	9/2
Quadrupole Moment
Discovery Year	1953
Parity	-

²¹⁹At Decay Modes

Decay Mode	Intensity
α (α emission)	93.6%
β⁻ (β⁻ decay)	6.4%

²²⁰At

Abundance	Radioactive ☢️
Relative Atomic Mass	220.015433 ± 0.000015 Da
Mass Number	220
G-Factor
Half Life	3.71 ± 0.04 m
Spin	3
Quadrupole Moment
Discovery Year	1989
Parity	-

²²⁰At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	92%
α (α emission)	8%

²²¹At

Abundance	Radioactive ☢️
Relative Atomic Mass	221.018017 ± 0.000015 Da
Mass Number	221
G-Factor
Half Life	2.3 ± 0.2 m
Spin	3/2
Quadrupole Moment
Discovery Year	1989
Parity	-

²²¹At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²²At

Abundance	Radioactive ☢️
Relative Atomic Mass	222.022494 ± 0.000017 Da
Mass Number	222
G-Factor
Half Life	54 ± 10 s
Spin
Quadrupole Moment
Discovery Year	1989
Parity

²²²At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²³At

Abundance	Radioactive ☢️
Relative Atomic Mass	223.025151 ± 0.000015 Da
Mass Number	223
G-Factor
Half Life	50 ± 7 s
Spin	3/2
Quadrupole Moment
Discovery Year	1989
Parity	-

²²³At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
α (α emission)	%

²²⁴At

Abundance	Radioactive ☢️
Relative Atomic Mass	224.029749 ± 0.000024 Da
Mass Number	224
G-Factor
Half Life	2.5 ± 1.5 m
Spin	2
Quadrupole Moment
Discovery Year	2010
Parity	+

²²⁴At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

²²⁵At

Abundance	Radioactive ☢️
Relative Atomic Mass	225.032528 ± 0.000322 Da
Mass Number	225
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	2010
Parity	+

²²⁵At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

²²⁶At

Abundance	Radioactive ☢️
Relative Atomic Mass	226.037209 ± 0.000322 Da
Mass Number	226
G-Factor
Half Life
Spin	2
Quadrupole Moment
Discovery Year	2010
Parity	+

²²⁶At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

²²⁷At

Abundance	Radioactive ☢️
Relative Atomic Mass	227.040183 ± 0.000322 Da
Mass Number	227
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	2010
Parity	+

²²⁷At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

²²⁸At

Abundance	Radioactive ☢️
Relative Atomic Mass	228.04496 ± 0.000429 Da
Mass Number	228
G-Factor
Half Life
Spin	3
Quadrupole Moment
Discovery Year	2010
Parity	+

²²⁸At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

²²⁹At

Abundance	Radioactive ☢️
Relative Atomic Mass	229.048191 ± 0.000429 Da
Mass Number	229
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	2010
Parity	+

²²⁹At Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

History

In 1869, existence of astatine was first predicted by Russian chemist Dmitri Mendeleev and called the element eka-iodine. In 1940, Dale R. Corson, Kenneth Ross MacKenzie, and Emilio Segrè isolated the element at the University of California, Berkeley. Instead of searching for the element in nature, the scientists created it by bombarding bismuth-209 with alpha particles. From the Greek astatos meaning unstable

Discoverers	D.R.Corson, K.R.MacKenzie, E.Segré
Discovery Location	United States
Discovery Year	1940
Etymology (Name Origin)	Greek: astatos (unstable).
Pronunciation	AS-teh-teen (English)

Astatine is highly radioactive

Astatine is preferentially concentrated in the thyroid gland

Uses

The newly formed astatine-211 is important in nuclear medicine. Once produced, astatine must be used quickly, as it decays with a half-life of 7.2 hours. Astatine-211 can be used for targeted alpha particle radiotherapy, since it decays either via emission of an alpha particle. Since its isotopes have such short half-lives there are no commercially significant compounds of astatine.

Sources

Does not occur in nature. Similar to iodine. Produced by bombarding bismuth with alpha particles.

Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body	0 %
Abundance in Meteor	0 %
Abundance in Sun
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

Astatine on ChemicalAid

Australian Educational Vocabulary ID	scot/1850
Brockhaus Enzyklopädie online ID	astat
CAS Registry Number	7440-68-8
ChEBI ID	30415
DSSTOX compound identifier	DTXCID40147882
DSSTox substance ID	DTXSID40225391
Den Store Danske ID	astat
Encyclopedia of China Online Database ID (Second Edition)	191040
Encyclopædia Universalis ID	astate
FAST ID	819270
Freebase ID	/m/027t9kn
GND ID	4143236-8
Gran Enciclopèdia Catalana ID	0005881
Great Russian Encyclopedia Online ID	1835401
InChI	InChI=1S/At
InChIKey	RYXHOMYVWAEKHL-UHFFFAOYSA-N
KBpedia ID	Astatine
Library of Congress authority ID	sh85008844
MeSH descriptor ID	D001246
Namuwiki ID	아스타틴
National Library of Israel J9U ID	987007294954905171
OmegaWiki Defined Meaning	155974
OpenAlex ID	C531082785
PSH ID	5815
PubChem CID	5460479
Quora topic ID	Astatine
Semantic Scholar topic ID	992086
Store norske leksikon ID	astat
Treccani ID	astato
WordNet 3.1 Synset ID	14653739-n
YSO ID	28791

Astatine (At)

Properties

Isotopes of Astatine

191At

191At Decay Modes

192At

192At Decay Modes

193At

193At Decay Modes

194At

194At Decay Modes

195At

195At Decay Modes

196At

196At Decay Modes

197At

197At Decay Modes

198At

198At Decay Modes

199At

199At Decay Modes

200At

200At Decay Modes

201At

201At Decay Modes

202At

202At Decay Modes

203At

203At Decay Modes

204At

204At Decay Modes

205At

205At Decay Modes

206At

206At Decay Modes

207At

207At Decay Modes

208At

208At Decay Modes

209At

209At Decay Modes

210At

210At Decay Modes

211At

211At Decay Modes

212At

212At Decay Modes

213At

213At Decay Modes

214At

214At Decay Modes

215At

215At Decay Modes

216At

216At Decay Modes

217At

217At Decay Modes

218At

218At Decay Modes

219At

219At Decay Modes

220At

220At Decay Modes

221At

221At Decay Modes

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222At Decay Modes

223At

223At Decay Modes

224At

224At Decay Modes

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225At Decay Modes

226At

226At Decay Modes

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227At Decay Modes

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228At Decay Modes

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