Template:Infobox astatine

Astatine, ₈₅At

Astatine
Pronunciation	/ˈæstətiːn, -tɪn/ ​(ASS-tə-teen, -⁠tin)
Appearance	unknown, probably metallic
Mass number	[210]
Astatine in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson  I  ↑ At ↓ Ts polonium ← astatine → radon
Atomic number (Z)	85
Group	group 17 (halogens)
Period	period 6
Block	p-block
Electron configuration	[Xe] 4f14 5d10 6s2 6p5
Electrons per shell	2, 8, 18, 32, 18, 7
Physical properties
Phase at STP	solid (predicted)
Density (near r.t.)	8.91–8.95 g/cm3 (estimated)
Molar volume	23.6 cm3/mol (estimated)
Atomic properties
Oxidation states	common: −1, +1 +3, +5, +7
Ionization energies	1st: 899.003 kJ/mol
Other properties
Natural occurrence	from decay
Crystal structure	​face-centered cubic (fcc) Face-centered cubic crystal structure for astatine (predicted)
CAS Number	7440-68-8
History
Naming	Ancient Greek astatos (ἄστατος) 'unstable'
Discovery	Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Isotopes of astatine
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 207At synth 1.80 h β+91% 207Po α8.60% 203Bi 208At synth 1.63 h β+99.5% 208Po α0.55% 204Bi 209At synth 5.41 h β+96% 209Po α4% 205Bi 210At synth 8.1 h β+99.8% 210Po α0.180% 206Bi 211At synth 7.21 h ε58.2% 211Po α42% 207Bi

At · Astatine
Po ← ibox Po	iso 85 At  [] IB-At [] IBisos []	→ Rn ibox Rn
File:Symbol category class.svg cat:At (0) File:Symbol category class.svg cat:At-isotopes (0) File:Commons-logo.svg Commons File:Wikidata-logo.svg Wikidata:Q999 File:Wiktionary-logo.svg Wiktionary
indexes by PT (page)

child table, as reused in {IB-At}
Main isotopes of astatine
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 207At synth 1.80 h β+91% 207Po α8.60% 203Bi 208At synth 1.63 h β+99.5% 208Po α0.55% 204Bi 209At synth 5.41 h β+96% 209Po α4% 205Bi 210At synth 8.1 h β+99.8% 210Po α0.180% 206Bi 211At synth 7.21 h ε58.2% 211Po α42% 207Bi

Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt)	caption: alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
most stable isotope
File:Notification-icon-Wikidata-logo.svg Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (0) · (this table: )

References

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