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Periodic Table - Elements - Astatine
| Symbol |
At |
|
| Atomic Number |
85 |
Relative Atomic Mass
12C = 12.0000 |
209.9871 (210At) |
Atomic Radius
pm |
n/a |
First Ionisation Energy
kJ mol-1 |
930 |
| Electronegativity |
2.2 |
Density
kg m-3 |
n/a |
Molar Volume
cm3 |
n/a |
Thermal Conductivity
W m-1 K-1 |
1.7 [300 K] |
Melting Point
K |
575 (est.) |
Boiling Point
K |
610 (est.) |
| Number of Isotopes |
29 |
Ground State Electron
Configuration |
[Xe]4f145d106s26p5 |
| Term Symbol |
3P3/2 |
| Discovery |
Discovered by D.R. Corson, K.R. Mackenzie and E. Segré (Berkeley, USA) in 1940 |
| Name Derived From |
Greek astatos meaning 'unstable' |
Name in Other
Languages |
 Croatian | Astat |
 Danish | astat |
 Dutch | astatine |
 Finnish | astatiini |
 French | astate |
 German | Astat |
 Italian | astato |
 Norwegian | astat |
 Portuguese | astato |
 Spanish | astato |
 Swedish | astat |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
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Page compiled: Wed Sep 05 18:37:53 GMT+01:00 2001
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