Astatine

Unknown
210
[Xe] 4f145d106s26p5
210At, 211At
17
6
p
85
2, 8, 18, 32, 18, 7
At
Unknown
300°C, 572°F, 573 K
350°C, 662°F, 623 K
Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè
1940
7440-68-8
4573995
More Information
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Atomic Data

Atomic Radiues, Non-bonded (A): 2.02
Electron Affinity (kJ mol-1): 270.2
Covalent Radiues (A): 1.48
Electronegativity (Pauling Scale): 2.2
Ionisation Energies (kJ mol-1) 1st 2nd 3rd 4th 5th 6th 7th 8th
- - - - - - - -

Oxidation States and Isotopes

Common oxidation states 7, 5, 3, 1, -1
Isotope Atomic Mass Natural Abundance Half Life Mode of Decay
210At 209.987 - 8.1 h EC
- α
- EC
211At 210.987 - 7.21 h α

Pressure and Temperature Data

Specific Heat Capacity: Unknown
Shear Modulus: Unknown
Young Modulus: Unknown
Bulk Modulus: Unknown
Pressure 400k Pressure 600k Pressure 800k Pressure 1000k Pressure 1200k Pressure 1400k Pressure 1600k Pressure 1800k Pressure 2000k Pressure 2200k Pressure 2400k
- - - - - - - - - - Unknown