[Latest] How old is Astatine now?

Living Person

Astatine
is

As of April 16, 2026

86 years old
approximately!

* Calculated from Wikipedia data.
Accuracy is not guaranteed.

Astatine, ₈₅At

Astatine
Pronunciation	/ˈæstətiːn, -tɪn/ ​(AS-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] 4f 5d 6s 6p
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/cm (estimated)
Molar volume	23.6 cm/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) (predicted)
CAS Number	7440-68-8
History
Naming	Ancient Greek ástatos (ἄστατος) 'unstable'
Discovery	Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Isotopes of astatine v e
Main isotopes Decay Isotope abun­dance half-life (t1/2) mode pro­duct At synth 1.81 h β90% Po α10% Bi At synth 1.63 h β99.5% Po α0.55% Bi At synth 5.41 h β96.1% Po α3.9% Bi At synth 8.1 h β99.8% Po α0.175% Bi At synth 7.214 h ε58.2% Po α41.8% Bi
Category: Astatine view talk edit | references

Wikipedia Categories

• Astatine
• Halogens
• Chemical elements
• Synthetic elements
• Pages including recorded pronunciations
• Pages containing links to subscription-only content
• Chemical elements with face-centered cubic structure

Look up "Astatine" on Wikipedia

People Also Viewed

Nice

1388 Born

Houston,_Texas

August 30, 1836 Born

Las_Vegas_City_Council

2020 Born

Southampton

2011 Born

Justin Trudeau

December 25, 1971 Born