Periodic table of the elements
PoloniumAstatineRadon
85
At
Astatine
(210)
2
8
18
32
18
7
85
At
Astatine
(210)
2
8
18
32
18
7
General
NameAstatine
SymbolAt
Number85
Chemical seriesHalogens
Group / Period17 / 6
Blockp-block
CAS registry number7440-68-8

Astatine is a radioactive element

Physical properties
Statesolid
Density g/cm3
Melting point575 K (302 °C, 576 °F)
Boiling point610 K (337 °C, 639 °F)
Critical point

Atomic properties
Atomic Weight(210) g/mol
Crystal structure
Electronegativity2.20
Atomic radius
Atomic radius (calculated)
Electron configuration[Xe] 4f14 5d10 6s2 6p5
Electrons per shell2, 8, 18, 32, 18, 7
Number of protons85
Number of neutrons125

Other languages
SpanishAstato
PortugueseAstato
FrenchAstate
GermanAstat
ItalianAstato
RussianАстат
PolishAstat
Chinese
Arabicأستاتين
TurkishAstatin
DutchAstaat


Periodic table of the elements
PoloniumAstatineRadon